NT210 + TPL210 RS485 MODBUS INSIDE

Transcription

1 INSTRUCTION MANUAL NT210 + TPL210 RS485 MODBUS INSIDE TECSYSTEM S.r.l Corsico (Milan) Phone.: Fax: R /07/13 NT210 + TPL210 RS485 MODBUS INSIDE

2 INTRODUCTION TO THE TEMPERATURE, PRESSURE AND LEVEL CONTROL, FOR OIL-IMMERSED TRANSFORMERS WITH HERMETIC HOUSING NT210+TPL210 device represents the evolution of NT959+TPL165 products for protection of hermetic-type oil-immersed transformers. The success met by the first model, stimulated us to develop a new version, thanks to the interest shown by the market. IMPROVEMENTS OF NEW TPL210. TEMPERATURE Temperature reading is even more accurate and full scale has been extended up to 200 C. PRESSURE The introduction of new calculus algorithms allows to obtain a more precise and stable reading. LEVEL The new oil level reading sensor has an higher resolution (subdivided on approximately 10 steps) and a more flexible alarm threshold programming. Besides, the reading is faster and more reliable. Note: NT210 allows you to enable or disable ALARM and TRIP level alarms (see the programming steps 9-12 at page 11 of this manual). This function must be used under control and responsibility of the monitored system serviceman. MECHANICS Thanks to the large received suggestions, the new TPL210 mechanics is closer to the installers needs. The housing has been improved both in the solidity and in the design, obtaining advantages of mounting easiness and reliability. 2 NT210 + TPL210 RS485 MODBUS INSIDE

3 1) TPL210 TECHNICAL SPECIFICATIONS SUPPLY Direct connection with the Power-link source of NT210 monitoring unit (9VDC 100mA max) DIMENSIONS External housing dimensions: DIN B head Stainless steel rod length = 200mm 3/4 GAS sliding union MEASURED QUANTITIES Oil temperature from 40 to +200 C Resolution: ±1 C Accuracy*: ±1 C full scale value Oil pressure: from 0 to 500 mbar Resolution: ±10 mbar ±10 digits Accuracy*: ±2% full scale value Level: level reading represents the oil centimetres introduced in the measuring rod, with accuracy* ±1 cm and approximation by defect * Single measure made by LTTS laboratory report 05/11. TESTS AND PERFORMANCES Assembly in accordance with CE rules Protection against electrical noises CEI-EN Dielectric strength 2000V ac for 1 minute Working temperature of the electronic part: -40 C to 85 C Working temperature just next to the 3/4 G coupling: from 40 C to 125 C IP65 housing Sensor self-diagnosis circuit T-P-L. Max. cable length: 100 m (4 wires AWG22/24, shielded-type, impedance 120 ohm) Mineral oil corrosion-proof pressure sensor (*) Vibration test IEC Amplitude ±1 mm from 2Hz to 13.2Hz Acceleration ± 0,7G from 13.2Hz to 100Hz. (*) Seismic test according to IEEE Standards Maximum depression 200mBar. * Cross reference NT210 for constructive analogy NT210 + TPL210 RS485 MODBUS INSIDE 3

4 2) NT210 TECHNICAL SPERCIFICATIONS SUPPLY Rated values: V a.c.-d.c. Vdc with reversibile polarities INPUTS Digital input for connection with TPL210 sensor TESTS AND PERFORMANCES Assembly in accordance with CE rules Protection against electrical noises CEI-EN Dielectric strength 2500 V alternating current for 1 minute between relays and supply, relays and power-link, relays and RS485 input, power-link and supply, RS485 input and supply. Working temperature: from 40 C to +60 C Humidity: 90% no-condensing Housing by NORYL 94VO selfextinguishing Front frame by polycarbonate IP65 Max. absorption: 4VA Data storage: 10 years minimum Option: protection treatment of the electronic part COMMUNICATION RS485 MODBUS INSIDE OUTPUTS 2 alarm relays (AL.1-AL.2) 1 relay to manage ventilation (FAN) 1 relay for sensor fault or working anomaly (FAULT) Output relays with 5A-250Vac resistive contacts Power-link output (9Vdc 100 ma max.) to feed TPL210 sensor. DISPLAY AND DATA MANAGEMENT 1 13 mm 3-digit display to show temperatures and messages 3 LED s to show the displayed quantity Oil temperature ( C), pressure (mbar) and level (cm) 6 LED s to show the state of the T-P-L alarms 1 LED to show the correct RS485 connection with TPL210 Temperature control: from 40 to 200 C Oil pressure control: from 0 to 500 mbar Under level control (threshold 0) Level alert control programmable (from 1 to 20) 2 alarm thresholds (AL.1/AL.2) for temperature and pressure 1 threshold for fast increase of the programmable pressure (FPS) 2 fan ON-OFF control thresholds driven by the oil temperature TPL210 sensor diagnostic Wrong programming display Data display mode chosen among automatic, manual scanning and storage. Maximum temperature and pressure storage recorded from last reset Frontal alarm reset push button DIMENSIONS 100x100 mm DIN43700 depth130mm (terminal box included) Panel cut-out 92x92mm 4 NT210 + TPL210 RS485 MODBUS INSIDE

5 3) SENSOR TPL210 INSTALLATION PROCEDURE ON HERMETIC TRANSFORMERS INTRODUCTION The installation method is described below as a guidance, the installer assumes the exclusive responsibility of the installation. PRECAUTIONS FOR INSTALLATION The transformer must be de-energized. The dielectric of the transformer must be at ambient temperature (about 20 C). The level of the dielectric must be slightly under the cover of the transformer. The mounting hole for the TPL210 must be open. TOOLS REQUIRED A wrench 13x13mm. A wrench 32X32mm. An Allen key (inbus) 2mm. An Allen key (inbus) 5mm. COMPONENTS SENSOR TPL210 KIT Flange Code: 1AC0047 1) Rubber gasket. 2) Mounting flange. 3) Washers for flange mounting. 4) Bolts for flange mounting. 5) Bleed valve air. 6) Cap of bleed valve air. Sensor KIT Code: 1AC0041 7) Fixing bolt compression fitting on the flange. 8) Bolt tightening fitting sensor.9) Compression fitting. 10) Sensor TPL210 11) Stem sensor. 12) Hole on the stem. 13) Bolt and allen head fixing. 14) Sensor head. 15) Connector cable power and data. 1AC0041 Code: 1CA0018 5m (*) 1AC ) Power and data cable OFF ON Image 2 (*) On request available in other lengths. Image 1 1MN0041 REV3 NT210 + TPL210 RS485 MODBUS INSIDE 5

6 4) DESCRIPTION STEP BY STEP (image 1) 1) Insert the rubber gasket (1) on the hole of the transformer's lid, following the specially sized holes with centering of the fixing bolts of the transformer. 2) Insert the mounting flange (2) above the rubber gasket. 3) Insert the 4 washers (3) contained in the kit by placing the knurled face down. 4) Insert the 4 bolts (4) supplied the kit and Tighten the bolts, use the wrench 13x13. Tighten but without tearing. 5) Make sure the air bleed valve (5) is in the OFF position (image 2). 6) Remove the cap on the air bleed valve (6), use the Allen key 5. 7) Be sure to remove the net and the packaging clamp from the sensor. 8) Tighten the bolt (7) of the compression fitting on the flange, use the wrench 32x32, blocking until it stops (position beyond which it will be not possible to tighten the bolt). Note: Do not disassemble/separate the two bolts of the compression fitting you could lost the internal clamps. 9) Check that the hole on the stem (12) of the sensor is not obstructed. 10) Insert the sensor (10) in the fitting (9) until the fixing bolt of the compression fitting (8) is not in contact with the fixing bolt of the sensor head (13). 11) Tighten the clamp bolt (8) of the compression fitting on the sensor, use the wrench 32x32, and tighten until completely block the sensor head. 12) If necessary, unscrew the allen screws securing the sensor head(13), use the Allen key 2, and turn the sensor head to connect the power / data cable. 13) Tighten the allen screws securing the sensor head (13), use the Allen wrench 2. 14) Connect the power and data cable (16), hand tighten the connector. 15) Finish filling the transformer. 16) Wait 5 minutes and opening the bleed valve air (5) position ON (image 2) pull out about half cup of oil or until the oil isn't going out very fluidly, put the bleed valve air on position OFF(image 2). 17) Insert and tighten the cap of the valve (6). 18) If necessary, top up the transformer. 6 NT210 + TPL210 RS485 MODBUS INSIDE

7 ASSEMBLY NOTES The sensor TPL210 is scheduled to be installed on the hermetic transformer lid using a threaded connection 3/4'' G male. Carefully follow the Installation steps above. For proper operation of the system, the maximum oil level must always be below the sensor. In the standard configuration (*) the end of the stem is located 4 cm below the lid of the transformer for remaining above the switches. The compression fitting must be inserted until it stops on the DIN head. Hole on the stem of the TPL does not have to be external or it must not be blocked by the compression fitting, but it must be below it (always check the tightening of the sensor: the sensor head must be completely blocked). Before powering on the transformer always check the tightening of the compression fitting and all screws and bolts. Any loosening of the compression fitting, screws and bolts may cause a malfunction. To get the best warranty and reliability of operation, Tecsystem has created a special flange that secures the TPL210 using the mount template electro-mechanical devices on the market. The flange must be mounted by placing the gasket and tighten bolts firmly without tearing. The TPL210 must be fully inserted into the fitting of the flange. Before tightening the compression fitting with a 32mm wrench, you can rotate it to select the position where there is the power and data cable connection. The filling or topping up the of the oil must be made with the transformer de-energized and at ambient temperature about 20 C. The presence of air bubbles could lead to changes in the level reading; therefore you should make sure that no bubble is present by temporarily opening the specially provided tap for gas bleeding or gathering. (image 2). (*) On request available in other lengths. For the header of the power and data cable, see the paragraph connecting cable contained in the instruction manual of the NT210 control unit at page 26. NT210 + TPL210 RS485 MODBUS INSIDE 7

8 5) MOUNTING OF NT210 Make a hole in the panel sheet with dimensions 92 x 92 mm. Firmly tighten the NT210 device with the enclosed fixing blocks. 6) TPL210 CONNECTIONS TPL210 has a M12 IEC connector which has to be connected with the monitoring unit through the enclosed specially provided cable. Please refer to pages 24 and 25 for the electrical connections. The signals are the ones for supply (POWER LINK) and data output (RS485). To obtain a good system grounding, use the specially provided screw on the outside of the sensor DIN head 7) SUPPLY OF NT210 NT210 Monitoring unit has an UNIVERSAL supply, i.e. it can be indifferently fed from 24 to 240 Vac-dc, regardless of polarities in V direct current. This peculiarity is obtained using a new-concept and new-designed tested feeder which relieves the technician of each concern for the correct supply Vac or Vdc. To terminal 41 must always be connected the ground. When the monitoring device is directly fed from secondary winding of the transformer to be protected, it can be damaged by high-intensity overvoltages. These problems occur if the main switch is connected without load. Above mentioned problems are much more evident when the voltage 220 Vac is directly taken from the transformer secondary bars and there is a fixed capacitor battery to phase the transformer itself. IMPORTANT NOTE: in case you have to replace an existing monitoring unit with a new one, in order to guarantee its safe and correct working, you must replace the sensor/relay/supply connection terminals with the new terminals supplied, provided that they are of a brand different from the previously mounted ones. To protect the monitoring device from line overvoltages, we suggest to use the electronic discharger PT , designed by TECSYSTEM S.r.l. for this specific purpose. As alternative we suggest to use supply voltages from 24 V alternating current or, much better, 24 V direct current. 8) ELECTRICAL CONNECTIONS FOR ALARMS AND VENTILATION Carry out the electrical connections on the removable rear terminals, after having removed them from the meter. ALARM and TRIP relays switch only when the set temperature limits are reached. FAN contact can be used to check the air extractors or it can be inserted in a transformer room conditioning circuit. FAULT relay (Fault) switches when the meter is fed, while gets de-energised when one of the following fault occurs: NT210 monitoring unit without supply ECH -> NT210 corrupt programming data ER0 -> communication error between TPL210 and NT210 ER1 -> faulty TPL 210 internal temperature sensor ER2 -> TPL210 temperature electronic card > than 85 C ER3 -> TPL210 temperature electronic card < than 20 C 8 NT210 + TPL210 RS485 MODBUS INSIDE

9 FLT T -> faulty oil temperature sensor FLT P -> faulty pressure sensor FLT L -> faulty level sensor FCD -> oil temperature fast increase (higher than x C/sec) FPS -> oil pressure fast increase (higher than x mbar/sec) Please refer to pages 24 and 25 for the electrical connections. 9) PROGRAMMED DATA DIAGNOSTIC In case of breaking of the internal storage or corruption of the programmed data, just after switching on, the Ech wording is displayed with the relevant reporting of the Fault contact. For safety reasons, in this case the default parameters: AL1-T=80 C, AL2-T=90 C, AL1- P=100mBar, AL2-P=200mBar, AL1-L=0, AL2-L=YES, Fan=yes, Fon=70 C, Foff=60 C, HFN=0, FCD=no, FPS=no are automatically loaded. Remove the Ech wording, by pressing RESET and run programming to insert the desired values. Finally turn off and turn on again the unit to verify the correct memory working; in case it is damaged and the Ech wording is still displayed, please return the monitoring unit to Tecsystem for repair). 10) TEMPERATURE MEASUREMENT (T). The temperature is read through a RTD Pt100 sensor placed at the end of the rod. When the detected temperature exceeds 1 C the set alert threshold (AL.1) the ALARM relay switches together with the turning on of ALARM led during T display. When the detected temperature exceeds 1 C the set alarm threshold (AL.2) the TRIP relay switches together with the turning on of TRIP led during T display. As soon as the detected temperature returns to equal or lower values than the set limit for ALARM and TRIP relay switching, they de-energise with consequent turning off of the relevant LED s. If the FCD function is enabled, in case of exceeding the programmed temperature increase speed, the FAULT relay switches together with FCD display on the screen. In case of FCD, ALARM and TRIP functions are inhibited. Press RESET to cancel FCD condition. 11) PRESSURE MEASUREMENT (P). The pressure is read through a sensor placed under the head, through the specially provided opening. When the detected pressure exceeds 1mbar the set alert threshold (AL.1) the ALARM relay (AL1) switches together with the turning on of ALARM led during P display. When the detected pressure exceeds 1mbar the set alarm threshold (AL.2) the TRIP relay (AL2) switches together with the turning on of TRIP led during P display. As soon as the detected pressure returns to equal or lower values than the set limit for ALARM and TRIP relay switching, they de-energise with consequent turning off of the relevant LED s. If the FSP function is enabled, in case of exceeding the programmed pressure increase speed, the FAULT relay switches together with FSP display on the screen. In this case ALARM and TRIP functions are always active. 12) PRESSURE SENSOR RESET To exploit in the best possible way the accuracy offered by the electronic pressure sensor, we suggest to carry out beginning of scale reset before activating the transformer, which must be cold and steady at room temperature: 1) Press MODE key and position in MAX mode 2) Press MODE once again and keep it pressed for 6 seconds until the monitoring unit is reset. NT210 + TPL210 RS485 MODBUS INSIDE 9

10 This operation will allow to compensate for possible reading tolerances due to the altitude or to the transformer filling pressure difference. For a proper working of the system, it must be carried out with the transformer cold. 13) LEVEL MEASUREMENT (L). The level sensor measures the height of the oil inside the metallic rod. The reading is expressed in cm. When the detected level reaches 0 (L2 activable threshold), AL2 alarm intervenes for underlevel and consequently TRIP relay switches. If the level reaches the programmed threshold ALARM (AL1) relay switches. TPL210 must be mounted so that the rod end is placed just next the L0 oil minimum level, under which you want to activate the under-level signalling and the transformer trip. The sliding union allows to rotate the sensor body in order to find the the optimal position to let the cable get out. In case you use the Tecsystem flange, TPL210 shall be inserted until the end. 14) COOLING FAN CONTROL NT210 monitoring unit can operate a machine cooling system depending on the oil temperature (example ON at 80 C - OFF at 70 C). 15) FAN TEST It is possible, through programming (HFn), impose that fans are activated for 5 minutes each xxx hours, regardless of column or room temperature values (example: with HFn=001 fans are activated for 5 minutes each hour). This function has the aim to periodically verify the working of the fans and their control apparatus during long idle periods. Loading 000 value this function is inhibited. 16) DISPLAY MODE Pressing MODE key, the display mode is loaded: SCAN: monitoring unit displays in scansion (each 2 seconds) Temperature, Pressure and Level quantities MAN: manual reading of the selected quantities (T-P-L) MAX: the monitoring unit displays the highest reached temperature and pressure values and the lowest level, as well as possible alarm or fault situations occurred from the last reset. Select the channels with, reset the values with RESET. 17) JOB PLAN CONTROL To check the programmed thresholds, shortly press PRG key. vis indication is displayed for 2 seconds, confirming entering the program view mode. Repeatedly pressing PRG key, you can scroll in sequence all the previously loaded values. After 1 minute of keyboard no-operation, the display programming procedure will be automatically left. To end display press ENT key. 18) LAMP TEST We suggest to regularly carry out monitoring unit LED test. For this operation shortly press TEST key; all displays turn on for 2 seconds. If one of the LED s should not work, we kindly ask you to return the Monitoring unit to TECSYSTEM. 10 NT210 + TPL210 RS485 MODBUS INSIDE

11 19) ALARM RELAY TEST This function allows to carry out a test on relay working without having to use further devices. To start test procedure you have to keep pressed the TEST key for about 5 seconds; TST indication is displayed for 2 seconds, confirming entering Relay Test mode. The blinking led shows the relay to test; using the cursors you can select the desired one. Press SET and RESET keys to energise and de-energise the relay to test; the display will show ON-OFF. After 1 minute of keyboard no-operation, RELAYS TEST procedure will be automatically left. For ending the RELAYS TEST procedure, press TEST key. 20) ALARM RELAY SILENCING If you want to silence the ALARM signal press RESET key: relay de-energises and LED ALARM, which was fixed, will start to blink. Silence system is automatically disconnected when the alarm condition(s) are no more present. 21) IMPORTANT NOTICE Before carrying out the insulation test on the switchboard where the monitoring unit is mounted, you have to disconnect it from the mains in order to avoid serious damages. 22) FRONT PANEL Message and temperature display Display mode Selected measurement alarms Selected quantity Link TPL210 Prg/Relays Test mode Keyboard NT210 + TPL210 RS485 MODBUS INSIDE 11

12 23) PROGRAMMING NOTA: LED PRG-ON OFF: PROGRAM DISPLAY LED PRG-ON ON: PROGRAM MODIFICATION N PRESS EFFECT NOTES 1 PRG/SET Keep pressed PRG key until PRG-ON LED turns on. After PRG indication, the ALARM (AL.1) threshold for T appears T= oil temperature 2 load desired threshold 3 PRG/SET TRIP (AL.2) threshold for T appears 4 load desired threshold 5 PRG/SET ALARM (AL.1) threshold for P appears P= oil pressure 6 load desired threshold 7 PRG/SET TRIP (AL.2) threshold for P appears 8 load desired threshold 9 PRG/SET ALARM (AL.1) for L appears No= default disabled function. 1 0 Load the desired threshold 1 1 PRG/SET TRIP (AL.2) threshold for L appears Note: AL.2 threshold can ne enabled or disabled; trip switches when the oil goes below the sensor rod end. 1 2 Select NO, or YES Yes = default enabled function. 1 3 PRG/SET Fan LED is blinking and display shows yes/no 1 4 Select NO, or YES NO: disabled fan, go to point PRG/SET Display shows ON FAN turning on PRG/SET Threshold ON of FAN appears Load desired threshold 12 NT210 + TPL210 RS485 MODBUS INSIDE

13 N PRESS EFFECT NOTES 18 PRG/SET Display shows OFF FAN turning off 19 PRG/SET Threshold OFF of FAN appears 20 load desired threshold 21 PRG/SET Display shows HFN Fan cyclic test for 5 minutes each n hours 22 Load desired number of hours 000= disabled function 23 PRG/SET Display shows FCD <> dato Fault for temperature fast increase ( C/sec) 24 Load desired value (see paragraph 22 page 12) From no (excluded function) to 30 C/sec 25 PRG/SET Display shows FPS <> datum Fault for pressure fast increase (mbar/sec) 26 Load desired value (see paragraph 23 page 12) From no (excluded function) to 200 mbar/sec 27 PRG/SET Display shows ADR <> datum Modbus address 28 Load desired address From 1 to PRG/SET Display shows BDR <> datum Modbus transmission speed 30 Load desired speed From 2.4 Kb/s to 38.4 Kb/s 31 PRG/SET Display shows PAR <> datum Select parity bit 1) E possibile tornare al passo precedente premendo il tasto MODE. None (No), Even (EVE), 32 Load desired parity bit 2) Se premendo ENT appare Err significa che è stato commesso uno Odd dei seguenti (ODD) errori: ALARM TRIP oppure FAN-OFF FAN-ON. Premere PRG per ritornare al passo 1 e correggere PRG/SET i dati. Display shows END Programming end 33 3) Dopo 1 minuto di inattività della tastiera viene abbandonata la programmazione senza memorizzazione dei dati. Err: wrong programming for values indicated by LED s (NOTE 34 ENT Loaded data storage and programming exit 2) 35 PRG/SET Return to step 1 NOTES: 1) It is possible to return to previous step by pressing MODE key. 2) If pressing ENT it appears Err, it means that one of the following mistakes has been made: ALARM TRIP or FAN-OFF FAN-ON. Press PRG to return to step 1 and correct the data. 3) After 1 minute of keyboard no-operation, programming is left without data storage. NT210 + TPL210 RS485 MODBUS INSIDE 13

14 24) NOTES ABOUT FCD FUNCTION. NT device series have an innovative control function combined with the Pt100 sensor dynamic state. If a temperature sensor should accidentally break down, the defect turns out with a fast increase of its resistance and therefore of the temperature ed by the monitoring unit. It is obvious that this increase is not consequential to the increase of power of the machine to be protected, whether it is a motor or a dry or encapsulated transformer. Therefore it is advisable to discriminate the state of the sensor and report a Fault notification rather than an Alarm or, worse, a Trip signal. In case of temperature control for electrical motors, the fast increase of the temperature could be the consequence of the working with jammed rotor and not of defective sensor; in this case the Fault relay, once energised, makes evident this anomalous condition for the motor working. By activating the FCD function it is possible to have on contacts a Fault signal when the temperature ed by a Pt100 increases with a speed higher than n C/sec (loadable from 1 to 30). Depending on the loaded value, you can have a different sensitivity; by loading no, FCD function is disabled. When a channel is in Fault condition for FCD, relevant Alarm and trip signalling are inhibited in order to just report the anomaly for too fast increase of the temperature. Press Reset to cancel the FCD signalling of all the channels and restore the fault relay. 25) NOTES ABOUT FPS FUNCTION. By enabling the FPS function it is possible to monitor conditions of pressure fast increase. If the pressure should go in a second beyond the programmed value, FAULT relay switches together with the FPS indication on the pressure channel. This increase is programmable at 10mBar steps up to a maximum of 200 mbar. Depending on the loaded value, you can have a different sensitivity; by loading no, FPS function is disabled. Too low values could lead to too frequent signalling, whereas too high values would reverse the behaviour. In case of FPS, the relevant Alarm and trip thresholds are always monitored. Press Reset to cancel the FPS signalling and restore the fault relay. 26) INTRODUCTION TO MODBUS INSIDE MODULE MODBUS INSIDE expansion module is built in the monitoring unit and it allows the data transfer on a RS485 network with MODBUS RTU protocol. 27) WORKING NOTES For a correct working of the module it is necessary to load RS485 network set-up parameters: address, baud rate, parity bit. Please refer to the programming steps from 27 to 32 as shown on the table at page 12. The serial communication of the temperature control monitoring unit is active just when NT210 is in temperature control working mode in one of the intended modes (Scan, Auto, and T.Max). When other functions such as programming, programming display and relay test are activated, the ModBus communication is temporarily deactivated. 14 NT210 + TPL210 RS485 MODBUS INSIDE

15 28) DATA TRANSMISSION ON MODBUS NETWORK The MODBUS INSIDE internal module allows to connect NT210 monitoring unit with a RS485 network with Modbus RTU protocol in order to read the data shown in the table 35 and to write the ones shown in section 32. The module is always in slave mode. NT210 monitoring unit is connected with the network just when it is in temperature, pressure or level reading mode and not when it is in programming, programming display or relay test. 29) RS485 ELECTRICAL CONNECTIONS As far as the signal cable to be used in order to ensure a proper network working is concerned, we recommend to follow what laid down by EIA RS485 standard which suggests to use a 24AWG duplex cable. The duplex cable which connects all the units in RS485 could require the activation of a 120 ohm termination resistance on the last unit of the series. Connect the duplex cable paying attention to polarities and lay the network avoiding to make sharp bends or ring windings in order not to modify the line impedance. If necessary, also the GND terminal for grounding is available 30) DATA FRAME The frame in asynchronous transmission is composed of: 1 start bit, 8 data bits, 1 parity bit (even or odd, if the parity has been set) and 1 stop bit. Admitted baud rates are: 2400, 4800, 9600, and b/s. Where no otherwise specified, the word length (DATA) is of 16 bits. 31) DATA PACKET A complete sequence of request/answer is composed as follows: Master request. SLAVE ADDRESS FUNCTION CODE DATA CRC Slave request. SLAVE ADDRESS FUNCTION CODE DATA CRC - 1 byte - 1 byte - variable, it depends by the function code - 2 bytes - 1 byte - 1 byte - variable, it depends by the function code - 2 bytes NT210 + TPL210 RS485 MODBUS INSIDE 15

16 30) FUNCTION CODE ModBus module supports the following function codes: 3 (10) : - holding reading 16 (10) : - multiple writing If ModBus receives a message and a CRC error is detected, no answer is given. 31) CODE 3 (10). Request: Slave address, code 3 (10), Starting address HI, Starting address LO, Number of Point HI, Number of Point LO, Crc LO, Crc HI. Answer: Slave address, code 3 (10), Byte count, Data HI, Data LO., Crc LO, Crc HI. 32) CODE 16 (10). Request: Slave address, code 16 (10), Starting address HI, Starting address LO, Number of Point HI, Number of Point LO, Byte count, Data HI, Data LO., Crc LO, Crc HI. Answer: Slave address, code 16 (10), Starting address HI, Starting address LO, Number of Register HI, Number of LO, Crc LO, Crc HI. The writable s are the ones containing the following data: Alarm, Trip, Fan-on, Fan-off. Therefore the possible starting addresses are: for alarm and fan, for the Trip thresholds and Number of Point LO parameter can be loaded just at 8. If a writing request is sent to an address different from the above mentioned ones, ModBus will answer with a 02 error code (wrong data address). If a writing request is sent for more than 8 s (Number of point LO), ModBus won t be able to accept the request and it won t give any answer. Therefore the query will go in timeout. 16 NT210 + TPL210 RS485 MODBUS INSIDE

17 32) NOTES FOR REMOTE PROGRAMMING. In case you want to program a NT210 you have to bear in mind that Temperature, Pressure and Level Alarm settings must be modified selecting 8 s at a time (s 00-17, ). The same note must be kept into consideration for Trip thresholds (s 00-25, ) as well as for each measured quantity (Temperature, Pressure, Level). Also in the remote programming via ModBus you must take into consideration that the Alarm thresholds must be lower than the Trip thresholds and that the Fan-on thresholds must be higher than the Fan-off thresholds. In case you try to load these thresholds in a wrong way, NT210 monitoring unit won t proceed with the programming and data storage; therefore in the coming readings you will read the data relevant to the previous programming. ERR message will be displayed before the re-start. After having sent a writing request, the monitoring unit will take approximately 1 to store the data in eeprom; during the storage phase, ModBus interface won t be able to process further requests. If the programming request successfully concludes, the monitoring unit automatically resets and loads the new loaded values. PRG message will be displayed before the re-start. 33) ERROR CODES (exception code). In case of wrong request ModBus will answer with modified codes and codified errors according to the following points: 1: - Non-supported function code 2: - Wrong data address 3: - Wrong data (for instance length) 34) POLLING FREQUENCY The max. time to give an answer to a calling never exceeds 1 second; therefore we suggest not to use polling frequencies with lower duration. NT210 + TPL210 RS485 MODBUS INSIDE 17

18 35) MODBUS MAPPING TABLE Address HI (10) Address LO (10) Data HI Data LO Primary tables Notes Oil temperature Temperature Range DATA LO -50 (10 ) Oil pressure HI mbar Oil pressure LO mbar Oil level cm Sensor temperature TPL Temperature Range DATA LO -50 (10 ) Not used Not used Not used 18 NT210 + TPL210 RS485 MODBUS INSIDE

19 Address HI (10) Address LO (10) Data HI Data LO Primary tables Notes State of oil temperature State of oil pressure HI See note 1 page Stato of oil level Not used Not used Not used Not used Not used Alarm Set Oil temperature C Alarm Set HI Oil pressure Mbar Alarm Set LO oil pressure mbar Alarm Set Oil level cm Fan On Fan Off Not used Not used C C NT210 + TPL210 RS485 MODBUS INSIDE 19

20 Address HI (10) Address LO (10) Data HI Data LO Primary tables Notes Oil temperature trip C Oil pressure trip HI mbar Oil pressure trip LO mbar Oil level trip Not used Not used Not used Not used cm = Hfn Fcd Fps See page 9 See page13 See page Trip for oil Level =0 0= enabled 1=disabled Not used Not used Not used Not used NOTE :AL1 = ALARM, AL2 = TRIP. 20 NT210 + TPL210 RS485 MODBUS INSIDE

21 Address HI (10) Address LO (10) Data HI Data LO Primary tables Notes T.max oil P.max HI P.max LO L. Min. oil Temperature Range DATA LO -50 (10 ) mbar mbar cm Oil temperature alarm history Oil pressure alarm history OIL Levelalarm history Not used FLG_GEN FLG_GEN2 See note 3 page State of TPL LO See note 4 page Not used Not used Not used Not used Not used NT210 + TPL210 RS485 MODBUS INSIDE 21

22 Address HI (10) Address LO (10) Data HI Data LO Not used Not used Not used Not used Not used Not used Not used Not used Not used Not used Not used Primary tables Notes NOTE 1: STATE REGISTER The state contains the information relevant to the state of the alarms for the related channel. Each bit represents a flag which is active when its value is 1. STATE OF OIL TEMPERATURE B7 B6 B5 B4 B3 B2 B1 B0 TRIP ALARM FREE FAN FOC FCC FCD FREE STATE OF OIL PRESSURE B7 B6 B5 B4 B3 B2 B1 B0 TRIP ALARM FREE FAN FOC FCC FPS FREE STATE OF OIL LEVEL B7 B6 B5 B4 B3 B2 B1 B0 TRIP ALARM FREE FAN FOC FCC FCD FREE STATE OF TPL 210 TEMPERATURE B7 B6 B5 B4 B3 B2 B1 B0 FREE FREE FREE FREE FOC FCC FREE FREE 22 NT210 + TPL210 RS485 MODBUS INSIDE

23 NOTE 2: REGISTER FOR HISTORIC ALARMS The state contains the information relevant to the storage of the alarm interventions for the related channel. Each bit represents a flag which is active when its value is 1. MEMORY OIL TEMPERATURE ALARMS B7 B6 B5 B4 B3 B2 B1 B0 TRIP ALARM FREE FAN FOC FCC FCD FREE MEMORY OIL PRESSURE ALARMS B7 B6 B5 B4 B3 B2 B1 B0 TRIP ALARM FREE FAN FOC FCC FPS FREE MEMORY OIL LEVEL ALARMS B7 B6 B5 B4 B3 B2 B1 B0 TRIP ALARM FREE FAN FOC FCC FREE FREE NOTE 3: GENERAL FLAG REGISTER The general function contains the information relevant to the enabling of general functions. FLG_GEN: GENERAL FLAGS B7 B6 B5 B4 B3 B2 B1 B0 FREE FREE FREE SYSTEM FLAG ECH EEPROM ERR FAN TEST IN PROGRE SS RESET ALARM1 Oil T<0 C FLG_GEN2: GENERAL FLAGS B7 B6 B5 B4 B3 B2 B1 B0 FREE SYSTEM FLAG SYSTEM FLAG SYSTEM FLAG ErO TPL210 timeout SYSTEM FLAG SYSTEM FLAG SYSTEM FLAG NT210 + TPL210 RS485 MODBUS INSIDE 23

24 NOTE 4: FLAG STATUS TPL210 Each bit represents a flag which is active when its value is 1. When the flag is active means that the sensor, even if fed is not working because it does not detect any flowing current (presence of no-load voltage),. One can suppose that the sensor is broken or wrongly connected. TPL210 STATUS LO B7 B6 B5 B4 B3 B2 B1 B0 Level sensor fault Er3 Ta< -20 C Er3 Ta> +85 C Pessure sensor fault Er1 fault Ta sensor Level sensors fault Level sensors fault Oil temp. sensors fault 36) CRC CALCULATION This protocol includes 2 CRC-16 bytes in each transmission. The characteristic polynomial ( B) is used for the calculation and the result is hung at the end of the package. The polynomial is used in the reverse order with the most significant bit suppressed because useless for calculation PARAMETER DESCRIPTION A - 16-bit AL - At low side AH - At high side i,j, - KWH METERS (+) - EXCLUSIVE OR Di - Frame data «i»th of the packet N - number of byte of the packet excluded 2 belonging to CRC G - Polynomial : shr - shift to the right ALGORITHM 1) 0xFFFF -> A 2) 0 -> i 3) 0 -> j 4) Di (+) AL -> AL 5) j +1 -> j 6) shr A 7) if carry then G (+) A -> A 8) if NOT j=8 then go to 5 9) i +1 -> i 10) if NOT i = N then go to 3 11) A -> in CRC (result is in the order L,H) 24 NT210 + TPL210 RS485 MODBUS INSIDE

25 NT210 ELECTRICAL CONNECTIONS ALARM RELAY OUTPUTS ALARM TRIP FAULT FAN SUPPLY VAC-VDC RS485 NT935 MODBUS OUTPUT GND 40: Power supply 41: Ground 42: Power supply TPL RS RS PWL PWL WHITE BLUE BROWN BLACK NT210 + TPL210 RS485 MODBUS INSIDE 25

26 TPL210 ELECTRICAL CONNECTIONS TPL210 Male Connector 1: + PWL BROWN 2: - RS BLUE 3: + RS WHITE 4: - PWL BLACK 3D FIXING FLANGE 26 NT210 + TPL210 RS485 MODBUS INSIDE

27 37) RULES FOR WARRANTY The purchased Product is covered by manufacturer s or seller s warranty within the bounds and under the conditions set forth in the General Conditions of Sale Tecsystem s.r.l., available on the website and/or the drawn up contract of purchase. The warranty is considered valid only when the Product is damaged by causes which can be attributed to TECSYSTEM srl, such as manufacturing or component defects. The Warranty is not valid if the Product would be tampered / modified, wrongly connected, because of supply voltages beyond the admitted limits, non compliance with the technical data for use and mounting, as described in this instruction manual. This Guarantee is always free our domicile in Corsico as stated in the General Conditions of Sale. RAEE: This symbol shown on the unit means that the waste must be subject to separate collection. Therefore the end-user shall send this unit to the waste separate collection centres or to return it to the dealer against the purchase of a new equivalent device. NT210 + TPL210 RS485 MODBUS INSIDE 27

28 NOTE : 28 NT210 + TPL210 RS485 MODBUS INSIDE