Instruction manual APU Hard alarm output contacts

Transcription

1 Instruction manual APU Hard alarm output contacts

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3 Instruction manual APU Hard alarm output contacts January 2010 Part no.: Rev. 3 Enraf BV PO Box AV Delft Netherlands Tel. : Fax : Enraf-nl@honeywell.com Website : Instruction manual APU Hard alarm output contacts Page 1

4 Copyright Enraf BV All rights reserved. Reproduction in any form without the prior consent of Enraf BV is not allowed. This manual is for information only. The contents, descriptions and specifications are subject to change without notice. Enraf BV 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 BV products are available from the supplier. Please retain them with your proof of purchase. Page 2

5 Preface Preface This manual is intended for the technicians involved in the commissioning and service of the Enraf series 873 SmartRadar option hardware alarm contacts. A description preceding the technical procedures gives the technical information necessary to understand its functioning. It is recommended to read this chapter prior to performing any of the procedures. For commissioning and installation of the 873 SmartRadar, please refer to the Instruction manual 873 SmartRadar and Installation guides of the 873 SmartRadar Control Unit & Antenna Unit. Refer also to the list of related documents in the Appendix. Safety and prevention of damage Refer to the chapter Safety in the Instruction manual of the 873 SmartRadar for the safety aspects of the instrument and for personal safety and the safety conventions. Legal aspects The commissioning of and troubleshooting to the instrument may only be conducted by qualified engineers, trained by Enraf and with knowledge of safety regulations for working in hazardous areas. The information in this manual is the copyright property of Enraf BV, Netherlands. Enraf BV 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; Neglect of the safety regulations for handling tools and use of electricity. Additional information Please do not hesitate to contact Enraf or its representative if you require any additional information. Instruction manual APU Hard alarm output contacts Page 3

6 Table of contents Table of contents Preface Introduction Commissioning Changing contact wiring from NC to NO Control setting for relay output contacts Operation Troubleshooting...9 Appendix Related documents...10 Index...11 Page 4

7 Introduction 1 Introduction The Enraf 873 SmartRadar is a radar based level gauge. It is designed to measure accurately and reliable the product level in large storage tanks. One of the optional functions in the SmartRadar is the hard alarm output contacts. The APU board is then equipped with two alarm relays. The alarm relays can be used as level alarm output or as digital output. The relays are of the SPDT type and are standard wired as normally closed (NC). If the normally open (NO) contact is required, the wiring at the APU board has to be changed from NC to NO (refer to figure 1.1). Operation of the relays Relays as hard alarm output contact: Both relays can be linked to one of the four level alarms (HA, HH, LA, LL) which can be programmed in the 873 SmartRadar. For instance, relay 1 (RL1, contacts at terminal 5 and 6) operates on the high high level alarm setting (item HH). The linking is realised by software (item settings). The action on alarm condition (energized or de-energized) can also be obtained via software (item setting). Relay as digital output: Another way of operating the relays is "remote controlled". One item controls both relays. This item has to be issued by the host or via the 847 PET (Portable Enraf Terminal). Instruction manual APU Hard alarm output contacts Page 5

8 Commissioning 2 Commissioning For information how to program items, refer to the instruction manual 873 SmartRadar or to the Instruction manual 847 Portable Enraf Terminal. For the connection of the external circuit wiring, refer to the Installation guide 873 SmartRadar Control Unit & Antenna Unit. 2.1 Changing contact wiring from NC to NO Refer to figure 2.1. If the alarm contact wiring has to be changed from normally closed to normally open, then proceed as follows: 1 Switch off supply of the Control Unit; 2 Open cover of electronic compartment; 3 Remove PCB retaining screw and slide locking latch on the XPU 2 board to the right and remove XPU 2 board; 4 On the APU board, change over the wiring at terminal strips CN2 and CN3 from NC to NO; 5 Replace XPU 2 board, slide locking latch to the left and place PCB retaining screw; 6 Close electronic compartment cover; 7 Apply mains power. Page 6

9 Commissioning 2.2 Control setting for relay output contacts Item AX needs to be set (checked) for the proper operation of the alarm relays on the APU board. Item Name Description W2= Protection level 2 Enter protection level 2 AX.0.1= Relay mode 12 ASCII characters; default setting: ME With this item control settings are given to the relays. Item AX is an indexed item consisting of two elements: element 1 for relay 1; element 2 for relay 2. The construction of each element is: EX Exit Exit protection level 2. Pos.: Description: Selection: 1 Mounted M relays are mounted - relays are not mounted 2 Energized E normally energized D normally de-energized 3 Remote control R relay set-up for remote control (via item RN) - relay set-up for level alarm 4 General APU failure G relay activated if general APU failure - relay not activated if general APU failure 5 Level failure F relay activated if level failure - relay not activated if level failure 6 Blocked B relay activated if level blocked - relay not activated if level blocked 7 Out of range O relay activated if level out of range - relay not activated if level out of range 8 Last valid level L relay activated if last valid level - relay not activated if last valid level 9 Reduced accuracy R relay activated if reduced accuracy - relay not activated if reduced accuracy 10 Warning W relay activated if warning - relay not activated if warning 11,12 Alarm HH relay linked to HH level alarm setting HA relay linked to HA level alarm setting LA relay linked to LA level alarm setting LL relay linked to LL level alarm setting - - relay not linked to one of the level alarm settings Note: Item AX is an indexed item. Therefore, to program relay 1, give: AX.0.1="desired setting" and to program relay 2, give: AX.1.1="desired setting". To read the relay mode setting of both relays, give: AX.0.2. Instruction manual APU Hard alarm output contacts Page 7

10 Operation 3 Operation The alarm relays can be remotely controlled by the host. Item RN controls the relays: Item Name Description RN Relay command 8 ASCII characters: (C1, T1, T2, T3, C2, T4, T5, T6). C1, T1, T2, T3: for relay output 1; C2, T4, T5, T6: for relay output 2. Command / data item; not protected. C1 (C2): Relay 1 (2) command: A Activate relay 1 (2) D De-activate relay 1 (2) K Alarm acknowledge - Don't change T1, T2, T3 (T4, T5, T6): Relay 1 (2) time data field: : Time setting in seconds for 'Activate' command only. If the time field is set to 000, the relay is continuously activated. For the other commands, dummy values must be specified (e.g. RN=K ). The 'Acknowledge' command can only be given when the relay is programmed for level alarm operation (item AX, pos. 3 set on "-"). The other commands can only be given as the relay is set for remote control (item AX, pos. 3 set on "R"). The actual relay status can be checked by data item RX (relay status): Item Name Description RX Relay status 2 ASCII characters (B0, B1) status information from resp. Relay 1 and Relay 2. Data item; read only. The characters are the same for relay 1 and 2 and their meaning is: B0 (B1): Relay 1 (2) status: K Acknowledge alarm D De-activate relay A Activate relay T Relay is active with time-setting F Relay failure N Relay is not mounted Page 8

11 Troubleshooting 4 Troubleshooting The 873 SmartRadar is a self diagnostic instrument. Detected errors can be requested by the host, or by the 847 Portable Enraf Terminal. Item EE (error APU request; indexed item!) contains three codes for alarm relay malfunction. These are: Relay 1 failure Relay 2 failure Relay 1 and relay 2 failure Note: The relay status and relay error condition is also signalled on the display of the Control Unit with display format A and display format B. Instruction manual APU Hard alarm output contacts Page 9

12 Appendix Appendix Related documents Installation guide 873 SmartRadar Control Unit & Antenna Unit Installation guide SmartRadar Antennas Instruction manual 873 SmartRadar Instruction manual 847 PET Instruction manual Ensite Service Tool Item documentation Enraf series 854, 873, 877 & 973 gauges Page 10

13 Index Index APU board...5, 6 Error APU request...9 Items AX...7 EE...9 RN...8 RX...8 NC...5, 6 NO...5, 6 Normally closed...5, 6 Normally open...5, 6 Relay command...8 Relay mode...7 Relay status...8 Safety...3 Instruction manual APU Hard alarm output contacts Page 11

14 Page 12 Notes

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