Instruction manual 878 Panel Indicator

Transcription

1 Instruction manual 878 Panel Indicator

2

3 Instruction manual 878 panel indicator (software version > A1.3) October 2013 Part no Revision 3 Enraf B.V. P.O. Box AV Delft Netherlands Tel. : Fax : hfs-tac-support@honeywell.com Website : Instruction manual 878 Panel Indicator Page 1

4 Copyright Enraf B.V. All rights reserved. Reproduction in any form without the prior consent of Enraf B.V. is not allowed. This manual is for information only. The contents, descriptions and specifications are subject to change without notice. Enraf B.V. accepts no responsibility for any errors that may appear in this manual. The warranty terms and conditions applicable in the country of purchase in respect to Enraf B.V. products are available from your supplier. Please retain them with your proof of purchase. Page 2 Instruction manual 878 Panel Indicator

5 Preface Preface This manual is intended for technicians involved with the installation, commissioning and service of the Honeywell Enraf Series 878 panel indicator For mechanical and electrical installation of the 878 panel indicator, refer to section 3 and 4. A description preceding the technical procedures gives the technical information necessary to understand its functioning. It is recommended to read this description prior to performing any of the procedures. Safety and prevention of damage Safe execution of the procedures in this manual requires technical experience in handling tools, and knowledge of safety regulations in handling electrical installation in hazardous environments. "Warnings", "Cautions", and "Notes" have been used throughout this manual to bring special matters to the immediate attention of the reader. A Warning concerns danger to the safety of the technician or user; A Caution draws attention to an action which may damage the equipment; A Note points out a statement deserving more emphasis than the general text, but does not deserve a "Warning" or a "Caution". The sequence of steps in a procedure may also be important from the point of view of personal safety and prevention of damage; it is therefore advised not to change the sequence of procedural steps or alter a procedure. Legal aspects The information in this manual is copyright property of Enraf B.V., Netherlands. Enraf B.V. disclaims any responsibility for personal injury or damage to equipment caused by: Deviation from any of the prescribed procedures; Execution of activities that are not prescribed; Negligence of the general safety precautions for handling tools, use of electricity and microwave radiation. EC declaration of conformity This instrument is in conformity with the protection requirements of EC Council Directive 89/336/EEC. The CE conformity marking fulfils the provisions of EN Generic Emission Standard EN Generic Immunity Standard when installed, maintained and applied according to requirements as specified in this manual. For delivery within EC only. Additional information Please do not hesitate to contact Honeywell Enraf or its representative if you require additional information. Instruction manual 878 Panel Indicator Page 3

6 Table of contents Table of contents Preface Introduction General information Principle of operation Functionality Level (temperature) window Water interface window Density windows Operational modes Data accuracy and integrity Storage and unpacking Storage Unpacking and inspection Mechanical installation Preparation of the panel indicator Mounting a new indicator Removing an old indicator Electrical installation Rear panel cabling Preparation of the instrument Changing the mains voltage Electrical connections Software Updating the software Initializing Commissioning Mechanical and electrical installation Display & configuration Display Display contrast The keyboard Indicator LEDs Jumper protection Selection of the menus Table of menu settings Menus Appendix A Dimensional drawing Appendix B Specifications Appendix C Window selection Appendix D Service functions Appendix E Error display screen Appendix F Recommended spare parts Appendix G Host communication Appendix H ASCII table Index Page 4 Instruction manual 878 Panel Indicator

7 Introduction 1 Introduction 1.1 General information The 878 panel indicator is the latest addition to the range of Honeywell Enraf indicators. This indicator provides remote indication for radar, servo and hydrostatic tank gauging instruments via the Honeywell Enraf fieldbus, using the GPU protocol. The 878 displays a complete set of tank data such as: product level product interface level temperature density (servo or observed) gauge address high and low level alarms and operational status information on its clear back lighted 4 x 20 characters liquid crystal display. Figure panel indicator Configuration of the various functions is easily done via the keys on the front panel and a display menu. The indicator can be optionally equipped with two alarm output relay contacts controlled by the gauge's high and low level programmable alarms. This indicator is developed for indoor use. Flexible interchanging with the older indicator series (like 856, 826) is possible while the panel cut-out is matching that of the older instruments, although the connection has to be changed. The instrument has an IP20 protection (only for indoor use). 1.2 Principle of operation A microprocessor converts the received GPU-protocol messages into a form suited for the display and adds the selected dimensions. Dimensions and other display parameters are pre-programmed. They can be changed by entering the setup menu. All settings are stored in NOVRAM (non-volatile memory). To prevent unintentional changes of NOVRAM settings, these settings can be protected by means of jumpers in the instrument. 1.3 Functionality A row of four soft-keys on the front panel enables the user to transmit various commands to the field instrument connected to the 878 panel indicator. The commands to be given depend on the selected display window. Instruction manual 878 Panel Indicator Page 5

8 Introduction Level (temperature) window For the level (temperature) window these commands are test, lock, unlock and block. These commands are only applicable for servo gauges. Test Lock Unlock Block The Test command raises the displacer for a few seconds, after which it returns to the liquid surface. The test command performs a repeatability test of the level measurement. After a Lock test command the displacer is raised until the motor high limit switch is reached. This command can be cancelled by an Unlock. The Unlock command is used to break off any operational command. The Block command stops the displacer Water interface window There are two different commands to start a water interface measurement. Initiating a water measurement (W_M) command causes the 878 panel indicator to monitor the displacer position. As soon as the water level is detected, the displacer will stop at the interface layer and the measured level value will be displayed. An unlock command must be issued to raise the displacer to the product level. In case of an interface dip (W_D) command the indicator operates identical to the interface measurement command with the exception, that when the interface level is detected, the displacer automatically returns to the product level. In both cases the interface level will be stored and displayed on the water window Density windows Density can be measured and displayed in two different ways. A density dip (D_D) command can be issued to the 854 to start a Tank Profile (TP) density measurement at 10 level positions equally divided over the product level. From the 10 measured values the 854 calculates the average density. This average density is displayed in the servo density window. In order to economize operations of the 854 ATG, a combined water and density dip (C_D) can be initiated. In this case first the interface measurement will be performed followed by the average density measurement. In addition to the above mentioned method observed density can be retrieved by means of two different measuring systems. These are based on HIMS and HTG. A HIMS system measures with either a radar gauge or a servo gauge the liquid level height. A pressure transmitter at the bottom of the tank measures the hydrostatic pressure. From the level and the hydrostatic pressure the observed density is calculated. A HTG system makes use of two pressure transmitters to calculate the observed density. The observed density measured via a HIMS or HTG system is displayed in the observed density window. Page 6 Instruction manual 878 Panel Indicator

9 Introduction 1.4 Operational modes Three operational modes can be chosen: stand alone fall-back When used in this mode the 878 panel indicator is directly connected to the field instrument. No host computer system is required. Operational commands supported by the various field instruments can be issued via the 878 panel indicator. In this mode (optionally) a host computer system interrogates the field instruments. When the host system would hamper, the 878 panel indicator takes over the interrogation of the field instrument. In this manner a continued indication of the tank measuring data is guaranteed. Immediately when the host system is back to normal, the indicator automatically switches back to the listening mode. Operational commands supported by the various field instruments can only be issued via the 878 panel indicator in case the host computer system fails. listen When used in listen mode the 878 panel indicator is connected to the Honeywell Enraf fieldbus and "listens" to the communication, refreshing its display each time the corresponding field instrument transmits its data after being polled by the host system. 1.5 Data accuracy and integrity The communication between the 878 panel indicator and the field instruments is digital and occurs via the Honeywell Enraf fieldbus with the GPU protocol. Received data is continuously checked and in case of an error the possible incorrect data is removed from the display and an error code is shown. This technique avoids incorrect reading and guarantees fast, reliable and absolutely correct data transfer as required by Weights and Measures authorities. The resolution of the level transmission is 0.1 mm and 0.01 C for temperature. If the 878 panel indicator does not receive data within a programmed period the indicator will clear the display and show a time-out message. Instruction manual 878 Panel Indicator Page 7

10 Unpacking 2 Storage and unpacking 2.1 Storage During storage, the 878 panel indicator should be kept in its original packing. 2.2 Unpacking and inspection Inspect the packaging on arrival and immediately notify the transporter or sales representative if there is any damage. Don't throw away the packing. It will be use when further transport on site is needed or when the instrument is returned for service or warranty. Inventory checklist: instrument in a housing of perforated steel; including rear-cover two mounting brackets a set fuses for 110 V/130 V and for 220 V/240 V the instruction manual you are reading now identification code sheet The identification code specifies the type of instrument delivered and must agree with your order. When the type on the label of your 878 panel indicator does not conform with the identification code, consult your representative or Honeywell Enraf. Page 8 Instruction manual 878 Panel Indicator

11 Mechanical installation 3 Mechanical installation 3.1 Preparation of the panel indicator Disconnect the rear cover by loosening the two screws. Press the leaf spring and slide the indicator out of the housing. Slide the housing into the panel. Hook the bracket cams in the holes of the housing and fasten the tightening screws until the mounting brackets are clamped against the panel rear-side (refer to figure 3.1). 3.2 Mounting a new indicator Before inserting the indicator into the housing it is recommended to proceed with the electrical installation. Insert the indicator into the housing until the leaf spring on the rear locks the instrument. Hook the rear cover in on the left side and fasten the two screws on both corners. Fasten the instrument when the electrical cables are connected. Fastening the back panel screws fixes the instrument in the panel (refer to figure 3.1). For Weights and Measures requirements it may be required to seal the instrument. For this purpose the instrument is equipped with an eye on the end of the locking spring. 3.3 Removing an old indicator The 878 panel indicator has the same panel cut-out as the older 823, 825, 826 and 856 instruments. Warning Be sure that the cabling is disconnected from all electrical power sources before starting. Detach all existing cabling on the rear side. Pull the old instrument out and loosen the two screws on both sides, and remove the old housing. Figure 3.1 Rear cover Instruction manual 878 Panel Indicator Page 9

12 Electrical installation 4 Electrical installation 4.1 Rear panel cabling The connectors can be connected to the cables before mounting the instrument. Care for the right orientation of the connectors. The terminal layout is found in figure 4.2. Use multicore or telephone cables. Apply the local regulations for the mains connection. When the indicator is replacing an older Honeywell Enraf indicator, pay attention to the fact that the rear panel connection differs. Caution: Always when the mains selector position is changed the value of the primary fuse must be checked! 4.2 Preparation of the instrument Before sliding the 878 panel indicator in the panel and applying the mains voltage, check that the mains voltage selector (refer to figure 4.1) is set to the right voltage. The mains selector switch is found on the right-hand rear side, above the mains transformer. 4.3 Changing the mains voltage The mains voltage is set in the factory according to your order, together with the right fuse. However, should the voltage be changed, check whether the value of the primary fuse is according to the new voltage. The fuse F3 is located next to the mains connector CN1. It has a flexible cap for protection against touching. Use 315 ma T (= slow blow) for 220 V or 240 V 630 ma T (= slow blow) for 110 V or 130 V 1 A T (= slow blow) for 65 V The fuse F1 and F2 are secondary fuses. Use for F1 1 A T (= slow blow) F2 250 ma T (= slow blow) Figure 4.1 Mains voltage selector Loosen the locking screw of the mains selector switch, slide the switch to the required position. The voltage is indicated on the PCB-board. Insert the locking screw again and fasten. Remount the instrument. Page 10 Instruction manual 878 Panel Indicator

13 Electrical installation 4.4 Electrical connections Mains Transmission Connector CN1 (3 pins) Connector CN2 (4 pins) - Pos. 1 and 2 always field instrument - Pos. 3 and 4 always host computer Relays Connector CN10 (12 pins) (optional) - Pos. 1, 2, 3 (Test) - Pos. 4, 5, 6 (Low alarm) - Pos. 7, 8, 9 (High alarm) - Pos. 10, 11, 12 (Fail) Figure 4.2 Terminal lay-out Figure 4.3 Stand alone and listen mode / fall-back mode Instruction manual 878 Panel Indicator Page 11

14 Software 5 Software The 878 panel indicator is a microprocessor based instrument. The resident software is installed in EPROM (Erasable Programmable Read Only Memory) Non-volatile data such as settings are stored in NOVRAM (see section 7.7). Data input in the menu is automatically stored in NOVRAM when the ENTER key is pressed and it is not lost when the mains power supply is interrupted. 5.1 Updating the software When changing of software is required, the EPROM has to be exchanged and the NOVRAM has to be initialized. 5.2 Initializing Normally the NOVRAM is initialized (= formatted) at delivery and in that case the following procedure can be skipped. Only after replacing the EPROM for upgrading the 878 panel indicator to a new software version, initializing of the NOVRAM is needed. To initialize the NOVRAM jumper 4 must be shorted. The jumpers are on the left side at the horizontal printed circuit board (refer to figure 5.1). The following display menus appear: NOVRAM setup mode: Press ENTER Figure 5.1 Jumpers Place the jumper in position 2 again. Note: The jumpers are only accessible when the 878 panel indicator is not sealed for Weights and Measures. Page 12 Instruction manual 878 Panel Indicator

15 Commissioning 6 Commissioning 6.1 Mechanical and electrical installation In this section a description is given of all actions to be taken when the 878 is mounted on site before it can be used for the first time. 1. Check the mechanical installation (refer to section 3). 2. Check the electrical installation (refer to section 4). 3. Check the mains voltage setting and the value of the fuses (refer to section 4.3). 4. Apply the mains power supply. If necessary adjust the display contrast with a small screwdriver by turning P1. It is warmly recommended to use an isolated screwdriver. Pull-out the front panel (refer to figure 7.2). 5. After switching on the mains, the 878 panel indicator shows the start-up window within a few seconds. After a while this window is replaced by the level (temperature) window or by the selected window in menu 8. The instrument is now operational. When the 878 panel indicator is used for the first time the non-volatile memory contains the default settings and some of these settings, as addressing and operation mode, must be programmed. This is done in the Setup mode. The default NOVRAM settings are shown in section Start with the SELECT Menu. The 878 panel indicator is delivered with default factory settings, as indicated in the "Table of menu settings" in section 7. Instruction manual 878 Panel Indicator Page 13

16 Display & configuration 7 Display & configuration 7.1 Display A bright lighted Liquid Crystal Display, with four rows of each twenty characters shows continuously the selected measuring data (refer to figure 7.1). The top row shows a programmable text which can be a product name or a tank number. The second and third row show the data received from the field instruments. The fourth row is a message line or displays the abbreviated functions of the soft-keys. There are five different display windows available which can be selected in menu Display contrast If necessary change the display contrast with a small isolated screwdriver by turning P1. Pull out the front panel (refer to figure). Figure 7.1 Front panel Caution Take care not to touch parts under tension as this might damage the instrument. 7.3 The keyboard Figure 7.2 Display contrast adjustment There are two rows of each four soft-keys on the front panel. The top row of keys is used to transmit the various commands to the field instrument. The function of the keys depends on the selected window. The bottom row of the display shows the abbreviated key function. Key functions can be switched on or off in menu 10. The keys 354 will only be operational after entering the menu settings. The bottom row is used for: DISPLAY TEST when pressing this key all dots in the display screen are presented shortly followed by a blanked display, to check missing dots. This key has a second function, when the fourth row of the display shows a fail message, this message can be removed by pressing this key. SELECT when pressing this key the indicator windows or settings can be changed. By pressing this key again the select mode can be left. 6 this key is only operational after entering the select menu and is used to step through the various menus. ENTER this key is used to confirm data entered in the select menu. Page 14 Instruction manual 878 Panel Indicator

17 Display & configuration 7.4 Indicator LEDs Four red indicator LEDs are located above and two white indicator LEDs are located on the right side of the display (refer to figure 7.1). TEST LA HA FAIL RXD TXD this LED is on if the test relay is activated. low level alarm message from the field instrument high level alarm message from the field instrument field instrument failure or 878 panel indicator failure when this LED is flashing the 878 panel indicator receives data when this LED is flashing the 878 panel indicator transmits data to the field instrument The RXD and TXD LEDs can be disabled in menu Jumper protection The jumper protection levels are: level 1 - user level 2 - W&M level 3 - service Menus settings are protected by jumper 1 and 2 only when the jumpers are removed. When the jumpers are shorted the menu's are not protected. When using jumper 3 the relays and LEDs are tested. Remove also connector C10 before using jumper 3. For jumper protections refer to section 7.7. Note: It is NOT possible to change settings when the 878 panel indicator is sealed by W&M see section Selection of the menus The procedure to enter the SET-UP menu is as follows: Press SELECT. Select SETUP using the 5 or 6 the key. Press three times ENTER Scrolling through the menus is done using the 5, 6 or the 4 3 keys. Press ENTER, to enter the selected menu. The setting of the menu can now be programmed. To quit the selected menu the ENTER or the SELECT key can be pressed. When pressing the ENTER key the new programmed settings are stored. When pressing the SELECT key the new programmed settings are not stored. Note: Menu settings can only be altered in case the menu is not jumper protected. All programmed settings are permanently stored in the NOVRAM, and protected against power failure. Instruction manual 878 Panel Indicator Page 15

18 Display & configuration 7.7 Table of menu settings Menu Menu name Default settings Possible selections Jumper 1 Address + TOI a. Level b. Temperature c. Water d. Servo density e. Observed density Address TOI 99 B 99 B 99 B 99 B 99 B Address TOI B, C, E B, C, E B, C, E B, C, E B, C, E 1 2 Baudrate , Time-out settings a. Transmission time-out b. Display time-out minutes 1.0 min. 0.5 min. selectable in steps of 0.5 minutes Dimensions a. Level b. Temperature c. Water d. Servo density e. Observed density Dim. W & M m appr C appr m appr kg/m 3 appr kg/m 3 appr Dimensions W & M m, ft, in, FIS appr/not appr C, F appr/not appr m, ft, in, FIS appr/not appr kg/m 3, API, lbs/cuft appr/not appr kg/m 3, API, lbs/cuft appr/not appr 2 5 Zero format ø ø or Decimal separator.. or, 2 7 Operational mode Listen Listen, Stand alone, Fall-back 2 8 Window selection a. Level b. Temperature c. Water d. Servo density e. Observed density Small On On On On Small, Large, Both, Off On, Off On, Off On, Off On, Off 2 9 Level / water scan TOR B B or L 2 10 Field commands a. Test / lock b. Block / unlock c. Water measurement d. Dens. measurement yes yes yes yes yes, no yes, no yes, no yes, no 2 11 Transm. LEDs On On, Off 2 12 Relay settings a. Alarm relay mode b. Relay config. De-energized energized / de-energized 2 note Tank identifier a. Tank identifier b. Show level address 878 panel indicator A1.3 No Alpha numeric characters yes / no 2 14 Window names a. Level / temp. small b. Level / temp. large c. Water d. Servo density e. Observed density a. Level / temp. small b. Level / temp. large c. Water d. Servo density e. Observed density Alpha numeric characters 2 Note: These parameters are set at NOVRAM init. They cannot be changed by the user. Page 16 Instruction manual 878 Panel Indicator

19 Display & configuration 7.8 Menus The following menus are available: Menu1 Address + TOI For each address a TOI can be selected. TOI's are B, C or E (refer to appendix G). Only when selecting C or E the contact status (external contact inputs from 811 servo gauge or 813 mechanical gauge transmitter) will be displayed. Menu 3 Time-out settings transmission time-out display time-out is only used in fall-back mode. Selection of 0 minutes is not advisable: the instrument will take over the communication as soon the host system has finalized a request. determines the maximum display time of the data before refreshment. When reaching a display time-out the displayed data is set to display time-out (TO). Note: In case a host fails to retrieve level, temperature or observed density data within the programmed time, a timeout will be displayed for the relevant item. When two or more items have a time-out the message "Display data time-out" will be displayed on the bottom line of the display window. Menu 4 Dimensions Selection of dimensions is possible for the following measured values: - level m, ft, in, FIS - temperature C, F - water m, ft, in, FIS - servo density kg/m 3, API, lbs/cuft - observed density kg/m 3, API, lbs/cuft In addition to the dimension a W&M approved / not approved selection can be made. When selecting "not approved" the selected dimension will be replaced by '##'. Display Level dimension Level small B record Level small L record Level large B/L record Dimension Metres +xxx*xxx ±xxx*xxxx xxx*xxx m Feet +0xxx*xxx ±xxxx*xxx xxx*xxx ft Inches +0xxxx*xx ±xxxxx*xx xxxx*xx in Fractions +0xx'xx"xx ±xxx'xx"xx xx'xx"xx /16 Legend: the (*) asterisk will be replaced by the selected decimal separator (selectable in menu 6). The (x) represents a level value. Instruction manual 878 Panel Indicator Page 17

20 Display & configuration B/L record large display As the level large display can only handle 6 characters there are some restrictions: - When displaying the level retrieved with an L record the 0.1 mm will be rounded to millimetres. - The '-' sign will only be displayed in case there are sufficient leading zero's available. - In case of a '-' sign and insufficient space to display the sign the level will not be displayed. In this case the level will be replaced by dashes. However the level status and alarm status will be displayed. Density dimension kg/m 3 API lbs/cuft Density display ddddd*d ±dddd*dd ddd*ddd Menu 7 Operational mode Listen, stand alone or fall-back can be selected. The fall-back mode can only be selected when the fall-back relay is mounted (option). - Listen when used in this mode the 878 panel indicator is connected to the Honeywell Enraf fieldbus and "listens" to the communication, refreshing its display each time the corresponding field instrument transmits its data after being polled by the host system. If the host stops polling the displayed data will be cleared and a message will appear (level time-out, temperature -, observed density - or display time-out). - Stand alone when used in this mode the 878 panel indicator interrogates and reads directly the connected field instrument(s). No host computer system is required. - Fall-back in this mode the host computer is master of the communication link and interrogates the field instrument(s). When the computer system goes down the 878 panel indicator starts automatically to interrogate the connected field instrument(s). After a complete scan of the 878 panel indicator the indicator will listen for one second whether the host is active before starting a new scan. Note: When the fall-back relay is defective the fail led will be on. Menu 8 Window selection Switching a window on means it can be selected by entering the Select menu. Switching a window off means that the window cannot be selected in the Select menu. Switching to a large display window means that level data is displayed in triple size characters. Page 18 Instruction manual 878 Panel Indicator

21 Display & configuration Menu 9 Level (water scan) TOR B or L can be selected. B retrieves level with a resolution of "1 mm" and L in "0.1 mm" (if supported by the field instrument). Menu 10 Field commands When pressing a key of a disabled command the message "Command not allowed" appears on the display window. Menu 12 Relay settings (option) a. alarm relay mode (energized, de-energized) In this menu the alarm relay mode, energized or de-energized can be selected. This applies only to the high and low alarm relays (HA and LA) in the 878 panel indicator. The high and low alarm settings are programmed in the field instrument. b. relay configuration (fall-back/ other relays - present, absent) (read only). The presence of the relays can be verified by selecting the relay configuration. The configuration cannot be changed in this menu. During initialisation of the NOVRAM the indicator itself determines if and which relays are mounted. Changing the configuration is only possible when the indicator is put in test mode with help of jumper 3. The fail relay is normally energized. This relay will be de-energized: - when the indicator has an operational failure. - during initialization until all displayed level data is valid. - during operation when any level data on the display is invalid. - when no answer on a request of the indicator is received. The test relay is normally de-energized. This relay is activated in case the received level status information of the field instrument is not valid. Note: During the execution of a combined water/density dip the low level alarm setting in the level gauge may be tripped and activate the low level alarm relay in the 878 panel indicator. In order to avoid this, the test relay (normally closed) may be switched in series with the low level alarm relay (normally open). This implies that the low level alarm will only be true, in case of a valid level status. Instruction manual 878 Panel Indicator Page 19

22 Display & configuration Menu 13 Tank identifier This menu enables the user to program a text string on the top row of the display window or to show the gauge address. The text string is not visible in the large display screen (level). a. tank identifier to be programmed b. show level address yes/no (for service purposes or sometimes required by W&M) The first row of the display can be programmed with a text string chosen by the user (e.g. a tank name or product name). The characters can be selected by using the 5 and 6 keys. See appendix H for the table of supported characters. Menu 14 Window names The texts can be changed using the keys (refer to appendix H) Page 20 Instruction manual 878 Panel Indicator

23 Appendix Appendix A Dimensional drawing 878 panel indicator Instruction manual 878 Panel Indicator Page 21

24 Appendix Appendix B Specifications Mechanical Dimensions: panel cut-out (W x H) x 91.5 mm (4 3 / 16 x 3 5 / 8 inch). front panel (W x H) 120 x 105 mm (4 3 / 4 x 4 1 / 8 inch). depth (excluding front panel) 368 mm (14 1 / 2 inch). Weight: Housing: 3.6 kg (7.2 lbs) stainless steel front polished stainless steel covered with dull polyester, transparent window Colour: RAL 7030 General Operation modes: Commands: Servo gauge commands: stand alone listen fall-back (option) accessible via push-buttons Lock Test Block Test Unlock Test Water measurement/dip Density/dip Electrical Mains: 110 Vac, 130 Vac, 220 Vac, 240 Vac (optional) 65 Vac Voltage variation: + 10% to - 20% Frequency: 45 Hz to 65 Hz Fuses: Dissipation: Isolating voltage: Lightning protection: Connections: Relay outputs (option): Fall-back (option): Contact rating: 315 ma T slow blow (220 /240 Vac) 630 ma T slow blow (110 /130 Vac) 1 A T slow blow (65 Vac) 25 VA peak current Imax = 2 A 1200 Vac Inputs and outputs via isolating transformers terminals for a wire size of up to 12 AWG thread relay for high and low alarm from field instrument, a test and a fail relay. 1 relay 250 Vac max, 3 A, max. 500 VA, single pole double throw. Page 22 Instruction manual 878 Panel Indicator

25 Appendix Display Type of display: Display data: Function keys: Indication lights: supertwist LCD with LED back-light 4 lines x 20 characters character size 2.95 x 4.75 mm (0.12 x 0.2 inch), 5 x 8 dots User selectable, level, water level, temperature, servo density, observed density, alarm status and operational messages. 8 membrane keys in front panel for: repeatability test, lock test, block, unlock a gauge, water measurement, water dip, density dip, combined dip, display test, select, cursor control and enter. 6 LEDs indicating: LA, low level alarm HA, high level alarm Test, test relay activated Fail, fail alarm relay activated RXD, receive data TXD, transmit data Data transmission Protocol: Type of communication: Baudrate: Field wiring: Number of conductors: Cable resistance: Cable capacitance: Enraf-GPU Enraf bi-phase mark, half duplex. 1200/2400 baud. EN-bus or with fall-back option individual connection to gauge. 2 conductors, (twisted pair) 200 Ω per conductor max. 1µF max. Hardware Printed circuit boards: IPS and IPU Environment Protection type: Ambient temp. range: Storage temp. range: IP20 (indoor use) -10 C to +60 C (- 26 F to +140 F). -50 C to +85 C (- 58 F to +185 F). Instruction manual 878 Panel Indicator Page 23

26 Appendix Appendix C Window selection The windows enabled in menu 8 are shown when pressing the SELECT key. Selection is done using the 5 6 keys and confirmed by pressing ENTER. Level & temperature small window : user definable string menu 13 aa : level alarm status llllllllll : level TO level time-out FF alarm data error or level data mmm : level dimension menu 4 error ML motor limit switch reached m metres BL displacer blocked ft feet HA high level alarm in inches LA low level alarm /16 fractions -- no alarm!!! invalid level? as unknown alarm status : refresh data indicator ee : level status ttttttt : temperature TO level time-out FF invalid level data uu : temperature dim. menu 4 ML motor limit switch reached BL displacer blocked TO temperature time-out LT gauge in lock test FF temperature failure TE gauge in test!! limit switch open WL water level found!! servo error DW searching for water!! displacer blocked SD scan density!! gauge in lock test -- valid level!! gauge in test? ls unknown level status C valid temperature F valid temperature Message line? ts unknown temperature status TG test cccc : contact status LT lock test BL block F1 F2 failure in external hardware UN unlock O2 contact 2 open C2 contact 2 closed For additional messages refer to appendix E O1 contact 1 open C1 contact 1 closed Page 24 Instruction manual 878 Panel Indicator

27 Appendix Level (temperature) large window : level aa : level alarm status mmm : level dimension menu 4 TO level time-out FL alarm data error or level data m metres error ft feet ML motor limit switch reached in inches BL displacer blocked /16 fractions HA high level alarm!!! invalid level LA low level alarm -- no alarm : refresh data indicator? as unknown alarm status ttttttt : temperature ee : level status uu : temperature dim. menu 4 TO level time-out FL invalid level TO temperature time-out ML motor limit switch reached FF temperature failure BL displacer blocked!! limit switch open LT gauge in lock test!! servo error TE gauge in test!! displacer blocked WL water level found!! gauge in lock test DW searching for water!! gauge in test SD scan density C valid temperature -- valid level F valid temperature? ls unknown level status? ts unknown temperature status For additional messages refer to appendix E cccc : contact status F1 F2 O2 C2 O1 C1 failure in external hardware contact 2 open contact 2 closed contact 1 open contact 1 closed Instruction manual 878 Panel Indicator Page 25

28 Appendix Water window : user definable string menu 14 Message line: : refresh data indicator W_M water measurement W_D water dip llllllllll : water level UN unlock mmm : level dimension menu 4 For additional messages refer to appendix E m metres ft feet in inches /16 fractions!!! invalid level ww : water status FL general fail / initial setting ML motor limit switch reached BL displacer blocked LT gauge in lock test SD density scan active TE gauge in test DW searching for water (downwards) NM water level not found -- water found NR measurement not ready LV last valid level Legend Initial after start-up dashes are displayed in the water window as the 878 panel indicator does not request water. This will only be done after starting a water measurement or a water dip. After starting a water measurement/dip the 878 panel indicator will display temporarily the displacer level. The dimension will be set to!!! As soon as a valid water level is found the dimension field will display the selected dimension (menu 4). When a water measurement is cancelled (via an Unlock) the last valid water level will be displayed Together with an LV (last valid) indication. When starting a new water measurement/dip the water level field will be set to dashes, the dimension to!!! and the status to 'NR'. Page 26 Instruction manual 878 Panel Indicator

29 Appendix Servo density window : user definable string menu 14 dddddddd : density value pp : servo density type qqqqqqqq : density dimension IP interface profile measurement kg/m3 kilogram per cubic meter TP tank profile measurement API degrees API lbs/cuft pounds per cubic feet ss : servo density status Message line: FL general fail / initial setting D_D density dip OF conversion overflow C_D combined dip (water & density) UF conversion underflow UN unlock NM no measuring point or out of range NR measurement not completed -- valid density For additional message refer to appendix E : refresh data indicator Legend Initial after start-up dashes are displayed in the density window as no measurement data are available. The dimension will be set to!!! As soon as a valid density has been retrieved the dimension field will display the selected dimension (menu 4). When starting a new density measurement the density field will be set to dashes, the dimension to!!! and the status to 'NR'. Instruction manual 878 Panel Indicator Page 27

30 Appendix Observed density window : user definable string menu 14 oo : observed density status : refresh data indicator FL general fail / initial setting OR pressure out of range dddddddd : density value TR exceeding trip pressure M? manual value used qqqqqqqq : density dimension L? last valid value used DH density high alarm kg/m3 kilogram per cubic meter DL density low alarm API degrees API -- valid density lbs/cuft pounds per cubic feet For addition messages refer to appendix E Legend As soon as a valid density has been retrieved (item QQ) the dimension field will display the selected dimension (menu 4). In case of a non valid measured value the dimension will be replaced by!!!!!!! Messages The bottom line of the display window is used to display a range of messages. These messages are displayed for approximately 2 seconds. 878 panel indicator waiting for data Level data time-out Temperature time-out Display data time-out Xmission time-out Observed density time-out No gauge answer Fall-back relay error TEST executed LOCKTEST executed BLOCK executed UNLOCK executed WATER MEAS. executed Water DIP executed DENSITY DIP executed COMBINED DIP exec. W_M active D_D active W_D active C_D active Command not allowed Key has no function Page 28 Instruction manual 878 Panel Indicator

31 Appendix Appendix D Service functions Service data can be retrieved from the indicator using a combination of keys (pressing them all simultaneously). Service data 1 Push DISPLAY TEST + Select Service data 2 Push DISPLAY TEST + 6 Push DISPLAY TEST to exit service data 1 & 2. Indicator reset A software reset is initiated by simultaneously pressing the keys DISPLAY TEST ENTER Instruction manual 878 Panel Indicator Page 29

32 Appendix Appendix E Error display screen AAA BBBBBBBBBBBBBBBBBBBBBBBBBBB CCCCCCCCCCCCCCCCC 000 USER reset 002 EPROM BCC error 004 LCD ram error 005 Watchdog error 006 External RAM error 007 NOVRAM EEPROM error 008 NOVRAM RAM error 009 NOVRAM overall BCC error 010 NOVRAM Device number error 011 NOVRAM version error 016 NOVRAM data error 030 LCD busy flag time-out 037 LCD write error 101 Watchdog reset 102 Software generated reset 140 Fall-back relay error 141 Test relay error 142 Low alarm relay error 143 High alarm relay error 144 Indicator fail relay error 145 PET transmission circuit error 146 PET receive circuit error 998 end of ROM reached error 999 general software error Page 30 Instruction manual 878 Panel Indicator

33 Appendix Appendix F Recommended spare parts Pos. nr. Description Part number 2 Printed circuit board IPU without alarm relays S Printed circuit board IPU including alarm relays and connector S Printed circuit board IPS 110, 130, 220 or 240 Vac S Printed circuit board IPS 65 Vac Display assembly S , 8, Panel Indicator connector set S Panel Indicator Touch panel assembly S , 13 Fuse set 878 Panel Indicator for 110 / 130 and 220 / 240 Vac S Fuse 1 A T for 65 Vac S Set screws and washers for 878 Panel Indicator S Instruction manual 878 Panel Indicator Page 31

34 Appendix Appendix G Host communication Record structure The GPU protocol is used for data communication with the 878 panel indicator, based on a record structure. A record is the largest independent block of data that is communicated over the transmission lines. The various sorts of records are characterized by a letter: A to Z. The basic structure of a record is as follows: STX Address NN TOI TOR DATA ETX BCC A record consists of a data field surrounded by an envelope. The envelope allows the receiver to detect the incoming record and to verify its proper reception. The envelope consists of: STX (start of transmission) ETX (end of transmission) BCC (block check character) The data field consists of: Transmission address of the field instrument TOI (type of instrument) TOR (type of record) Data byte(s), (depending of the type of record) For further information see the protocol manuals of the field instruments. Record interpretation Transmission address NN The transmission address NN identifies the address of the Honeywell Enraf field instrument. The 878 panel indicator offers the possibility to program individual addresses for level, interface level, temperature, servo and observed density. These addresses can be selected in menu 1. Example: In case of an 854 with temperature and an 877 HIMS data can be retrieved as follows: The address TA from the 854 can be used to retrieve level and interface level and temperature. The address TA from the 877 HIMS can be used to retrieve observed density. Type of instrument TOI The type of instrument (TOI) as selected in menu 1 can be: B 811, 854, 97x and 877 C 813, 97x and 877 E 811 with external contacts Page 32 Instruction manual 878 Panel Indicator

35 Appendix Type of record TOR The TOR can be a data request or answer message or an operational command. The 878 panel indicator captures or requests only information from the following records: B level C temperature L level in 0.1 mm W search for water level Z in case of Z records (items SC, DZ, EZ, SD, TP and QQ only). In case of operational commands the 878 panel indicator listens or requests information from the commands listed in Data The data field is always used in case of an answer record. The length depends on the TOR. If the TOR is a Z, the datafield commences always with an Item, identified with its two characters abbreviation. Record transmission Records are only transmitted in stand alone and fall-back modes. Pushing the key under the soft-label in the display, the 878 panel indicator generates one of the following records. Soft-label display line 4 Description TOR TG Test gauge T LT Lock test O BL Block N UN Unlock U WM Water measurement W UN Quit water measurement & water/density combined U WD Water dip W DD Density dip SC CD Combined dip W/SC Instruction manual 878 Panel Indicator Page 33

36 Appendix Z-record The Z-record allows access to items used to program or to retrieve data from field instruments such as the 854, 872, 877, etc. If Z-records are used the TOR is always a Z. The data field (request & answer) contains always a 2 character abbreviation (ITEM). The 878 panel indicator makes use of the following Z-records: SC servo density to retrieve the servo density from the 854 QQ observed density to retrieve observed density from a HIMS or HTG field instrument DZ density profile stop this is the lowest density measurement level programmed in the 854. The 878 panel indicator retrieves this value and down line loads this value into item EZ. DZ should always be programmed in such a way that it is above the water level in the tank. This Item must be programmed in the 854. EZ density profile stop this item is used by the computer system or the 878 panel indicator to down line load the density stop level. SD scan direction this item specifies whether the tank density profile measurement is started from the product surface downwards or from the bottom upwards. TP tank profile density scan this command starts a density profile measurement. Page 34 Instruction manual 878 Panel Indicator

37 Appendix Appendix H ASCII table Instruction manual 878 Panel Indicator Page 35

38 Index Index Alarm contact... 5, 11 high level... 5, 15, 19 low level... 5, 15, 19 Caution... 3 Command block... 6 lock... 6 test... 6 unlock... 6 Connector CN Data Density dip... 6 measurement... 6 observed... 5, 6, 17, 34 profile stop servo... 5, 17, 34 Display contrast time-out window Honeywell Enraf fieldbus... 5, 7, 18 EPROM Error code... 7 display screen Fail contacts relay Fuse primary secondary Gauge address... 5 HIMS... 6 HTG... 6 Identification code... 8 Indicator reset Interface dip... 6 measurement... 6 Jumper protection Key display test enter select Keyboard Large display LCD... 5, 14 LED fail HA LA RXD test TXD Locking screw spring... 9 Mains voltage Menu address dimensions field commands level (water scan) operational mode relay settings tank identifier time-out settings window names window selection Messages Mounting brackets... 8 Note... 3 NOVRAM... 5, 12, 13, 19 Operational mode fall-back... 7, 17, 18 listen... 7, 18 stand alone... 7, 18 PCB-board Product interface level... 5 level... 5 Record B B/L interpretation L structure transmission Service data data functions Set-up menu Soft-keys... 5, 14 Software update Spare parts Page 36 Instruction manual 878 Panel Indicator

39 Index Specifications data transmission display electrical environment general hardware mechanical Tank Profile... 6 Temperature... 5 Test contacts relay TOI... 17, 32 TOR... 19, 33 Transmission address time-out Warning... 3 Water measurement... 6 Weights and Measures... 7, 9, 17 Window density... 6 level (temperature)... 6, 13, 24, 25 observed density servo density start-up water interface... 6, 26 Z-record Instruction manual 878 Panel Indicator Page 37

40 Honeywell Enraf Delftechpark XJ Delft The Netherlands Tel: +31 (0) Revision 3 January Honeywell International Inc.