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Omega Engineering CN8240 manual

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Table of contents for the manual

  • Page 1

    CN 82 40 & C N8 26 0 Se ri es C om mu ni ca ti on s & Op ti on s www .omega.com e-mail: info@omega.com ome ga. com ® ® CN8240 & CN8260 SERIES Communications & Options Guide User ’ s Guide TM 10002 Athena Omega:900M124U00.qxd 5/13/08 2:39 PM Page 1[...]

  • Page 2

    CN 82 40 & C N8 26 0 Se ri es C om mu ni ca ti on s & Op ti on s i It is t he p olic y of OME GA to com ply with al l wo rldw ide safe ty a nd E MC/E MI r egu lati ons that app ly . OME GA is cons tant ly p ursui ng cer tifi cati on of its prod ucts to the Euro pean New App roac h Dir ectiv es. OME GA wi ll a dd t he C E ma rk t o ev ery ap[...]

  • Page 3

    CN 82 40 & C N8 26 0 Se ri es C om mu ni ca ti on s & Op ti on s ii T able of Contents For inf or mation and instructions related to basic operations , refer to the CN8240/CN8260 operator’ s manual supplied with your controller . Option Wiring Diagrams Alarm Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [...]

  • Page 4

    1 2 3 1 1 12 13 2 3 2 4 RCV B(-) XMT A(+) SIG GND SIG GND RS 232 RS 485 RCV XMT SIG GND CN 82 40 & C N8 26 0 Se ri es C om mu ni ca ti on s & Op ti on s 1 Option -C2: RS-232 (one-to-one) Communications Option Description: Provides a one-to-one connection between the controller and an RS-232 port. Computers, PLCs, or dumb terminals may be us[...]

  • Page 5

    CN 82 40 & C N8 26 0 Se ri es C om mu ni ca ti on s & Op ti on s 2 RS-485 Communications 1 2 3 1 1 12 13 14 2 3 2 4 4 RCV B(-) XMT A(+) SIG GND SIG GND RS 232 RS 485 Option Description: Provides one-to-many communications. T erminate the controller furthest from the computer by either connecting a 120-ohm, 1/4-watt resistor between ter- min[...]

  • Page 6

    Option Description: Remote setpoints use either voltage or current inputs, depending on the specified option: Option -DIC: Switch Input Closed Option -RSP4: 0-5 Vdc Option -RSP5: 1-5 Vdc Option -RSP6: 0-20 mA Option -RSP7: 4-20 mA The input signal is scalable in the Remote Analog Setpoint Menu. Activation of the analog setpoint causes the F1 indica[...]

  • Page 7

    CN 82 40 & C N8 26 0 Se ri es C om mu ni ca ti on s & Op ti on s 4 CN8240/CN8260 Series Controllers with Digital Communications Option ome ga.c om ® ® 10002 Athena Omega:900M124U00.qxd 5/13/08 2:39 PM Page 7[...]

  • Page 8

    CN 82 40 & C N8 26 0 Se ri es C om mu ni ca ti on s & Op ti on s 5 Di git al Co mmu nic at ion s O pti on This method allows bidirectional data transfer via a three-conductor cable consisting of signal ground, receive input and transmit output. It is recommended for communication distances less than 50 feet between the computer termi- nal a[...]

  • Page 9

    Message Code Value = Decimal Value 00 0 + 0 = 00 99 90 + 9 = 99 A0 100 + 0 = 100 A2 100 + 2 = 102 B8 110 + 8 = 118 P5 250 + 5 = 255 CN 82 40 & C N8 26 0 Se ri es C om mu ni ca ti on s & Op ti on s 6 Omega+ Protocol The Omega+ Protocol provides an easy way to query and modify controller parameters using a personal computer and the optional d[...]

  • Page 10

    CN 82 40 & C N8 26 0 Se ri es C om mu ni ca ti on s & Op ti on s 7 TYPE character Message T ype R Read Request or Read Response Returning a Positive Result r Read Response Returning a Negative Result W Write Positive Value Request and Response w Write Negative Value Request and Response A Auxiliary Command Di git al Co mmu nic at ion s O pt[...]

  • Page 11

    CN 82 40 & C N8 26 0 Se ri es C om mu ni ca ti on s & Op ti on s 8 Di git al Co mmu nic at ion s O pti on Numeric Value ASCII Representation 3 3.0000 000003 003.00 100 100.00 0100.0 000100 3.2 003.20 0003.2 Examples of valid numeric representations f or a 6 character data field: Numeric Value Bad ASCII Representation Why? 3 BBBBB3 Leading b[...]

  • Page 12

    CN 82 40 & C N8 26 0 Se ri es C om mu ni ca ti on s & Op ti on s 9 READ RESPONSE FROM CONTROLLER READ COMMAND TO CONTROLLER Controller ID Read Command Checksum Start of Message Zone Number Parameter Number End of Message $0101R01B7<CR> Controller ID Read Command Data Checksum Start of Message Zone Number Parameter Number End of Messag[...]

  • Page 13

    CN 82 40 & C N8 26 0 Se ri es C om mu ni ca ti on s & Op ti on s 10 WRITE RESPONSE FROM CONTROLLER Controller ID Write Command No Error Checksum Start of Message Zone Number Parameter Number End of Message %0101W090H8<CR> A UX IL I AR Y R ES P O NS E F R O M CO N T RO LL E R A UX IL I AR Y C O M MA N D T O C O N TR O L L ER Controller[...]

  • Page 14

    CN 82 40 & C N8 26 0 Se ri es C om mu ni ca ti on s & Op ti on s 11 Di git al Co mmu nic at ion s O pti on The Read Request: The Read Request is used to query parameter values and it has the following message format: [ST ART CHAR][ID][ZONE][TYPE][PARAM][CHKSUM][END CHAR] Field Description: TYPE Must contain the uppercase letter ‘R’. Req[...]

  • Page 15

    Request Message Description $Ø1Ø1WØ91Ø.123G7<CR> Change both the RAM and EEPROM copies of Setpoint #1 in controller #1 to the value of 10.123 $Ø1Ø1w1Ø1Ø.123J1<CR> Change only the RAM copy of setpoint #1 in controller #1 to the value of -10.123 (notice the lowercase ‘w’). END CHAR CHKSUM DA TA P ARAM TYPE ZONE ID ST ART CHAR [...]

  • Page 16

    CN 82 40 & C N8 26 0 Se ri es C om mu ni ca ti on s & Op ti on s 13 Request Message Description $Ø1Ø1AØ1XXXXXXXXXXL2<CR> T ell controller #1 to load all parameters with their defaults. The 10 X’ s are padding characters. $Ø2Ø1AØ2ØØØ1.ØØØØØ69<CR> T ell controller #2 to perform a low RTD calibration. END CHAR CHKSU[...]

  • Page 17

    CN 82 40 & C N8 26 0 Se ri es C om mu ni ca ti on s & Op ti on s 14 Request Message Description %Ø1Ø1RØ5Ø21.123K8<CR> The value of the Process Variable is 21.123 Degrees C. %Ø2Ø1R1Ø1G7<CR> A serial transmission has occurred: Framing Error %Ø1Ø1rØ9Ø21.ØØØN8<CR> The value of the EEPROM setpoint #1 is -21 Degree[...]

  • Page 18

    CN 82 40 & C N8 26 0 Se ri es C om mu ni ca ti on s & Op ti on s 15 Request Message Description %Ø1Ø1AØ1ØXXXXXXXXXXØ4<CR> Default load all parameters has started. %Ø2Ø1AØ2ØØ.ØØØØØØØØB6<CR> RTD low calibration on controller #2 has started. END CHAR CHKSUM DA TA ST ATUS P ARAM TYPE ZONE ID ST ART CHAR Di git al C[...]

  • Page 19

    CN 82 40 & C N8 26 0 Se ri es C om mu ni ca ti on s & Op ti on s 16 Di git al Co mmu nic at ion s O pti on T able 1. Continued Number Name Read Write Data Field Value 5 Process Value X 0 6 Operating Mode X X 1 - Manual 2 - Standby 3 - Normal (automatic) 4 - Initiate Autotune 5 - Recipe Run 6 - Recipe Hold 7 Access Level X X 1 - Lockout 2 - [...]

  • Page 20

    CN 82 40 & C N8 26 0 Se ri es C om mu ni ca ti on s & Op ti on s 17 Di git al Co mmu nic at ion s O pti on T able 1. Continued Number Name Read Write Data Field Value 39 Autotune Damping X X 1 - Low 2 - Normal 3 - High 40 Recipe Option X X 0 - Disabled X X 1 - Single Step X X 2 - Multi-Step 41 Single-Setpoint X X Ramp Time 42-49 Ramp Times [...]

  • Page 21

    CN 82 40 & C N8 26 0 Se ri es C om mu ni ca ti on s & Op ti on s 18 Di git al Co mmu nic at ion s O pti on T able 1. Continued Number Name Read Write Data Field Value 92 Input T ype X X 0 - B Thermocouple 1 - C Thermocouple 2 - E Thermocouple 3 - J Thermocouple 4 - K Thermocouple 5 - N Thermocouple 6 - NNM Thermocouple 7 - R Thermocouple 8 [...]

  • Page 22

    CN 82 40 & C N8 26 0 Se ri es C om mu ni ca ti on s & Op ti on s 19 Di git al Co mmu nic at ion s O pti on T able 1. Continued Number Name Read Write Data Field Value A2 Output 1 Cycle Time X X A3 Output 1 Low Limit X X A4 Output 1 High Limit X X A5 Output 2 T ype X X 1 - Inactive/Disabled 2 - PID 4 - On/Off A6 Output 2 Action X X 1 - Direc[...]

  • Page 23

    CN 82 40 & C N8 26 0 Se ri es C om mu ni ca ti on s & Op ti on s 20 Di git al Co mmu nic at ion s O pti on T able 1. Continued Number Name Read Write Data Field Value D0 Alarm 2 Delay X X D1 Alarm 2 Inhibit X X D2 Alarm 2 Process Setpoint X X D3 Alarm 2 Deviation Setpoint X X D4 Communications Protocol X 0 1 - Omega + D5 Communications ID X[...]

  • Page 24

    CN 82 40 & C N8 26 0 Se ri es C om mu ni ca ti on s & Op ti on s 21 Di git al Co mmu nic at ion s O pti on T able 1. Continued Number Name Read Write Data Field Value F6 High-Voltage Span Calibration X X F7 Current Zero Calibration X X F8 Current Span Calibration X X G1 Auxiliary Output Variable X X G2 Auxiliary Output Scale Low X X G3 Auxi[...]

  • Page 25

    CN 82 40 & C N8 26 0 Se ri es C om mu ni ca ti on s & Op ti on s 22 Auxiliary Commands: Command: Load Parameter Defaults Parameter #: 01 Description Restore all menu parameters to their default values. Request Data Field: Ignored. Response Data Field: Ignored. Command: Perform Process Low Calibration Parameter #: 02 Description: Performs a [...]

  • Page 26

    CN 82 40 & C N8 26 0 Se ri es C om mu ni ca ti on s & Op ti on s 23 Request Data Fields: A 10-character ASCII representation of a numeric value specifying what to calibrate. 0 - Thermocouple 1 - RTD, Resistive Thermal Device 2 - Linear 3 - RAS, Remote Analog Setpoint Response Data Field: Ignored. Command: Perform Process High Calibration Pa[...]

  • Page 27

    CN 82 40 & C N8 26 0 Se ri es C om mu ni ca ti on s & Op ti on s 24 No tes 10002 Athena Omega:900M124U00.qxd 5/13/08 2:39 PM Page 27[...]

  • Page 28

    CN 82 40 & C N8 26 0 Se ri es C om mu ni ca ti on s & Op ti on s 25 No tes 10002 Athena Omega:900M124U00.qxd 5/13/08 2:39 PM Page 28[...]

  • Page 29

    CN 82 40 & C N8 26 0 Se ri es C om mu ni ca ti on s & Op ti on s 26 No tes 10002 Athena Omega:900M124U00.qxd 5/13/08 2:39 PM Page 29[...]

  • Page 30

    FOR WARRANTY RETURNS, please have the following information available BEFORE contacting OMEGA: 1 . Purc hase Order number under which the product was PURCHA SED, 2. Model an d se ria l n umb er o f t he pro duc t un der war ranty , and 3. Repair instructions and/or specific problems relative to the product. FOR NON-WARRANTY REP AIRS, consult OME GA[...]

  • Page 31

    W h e r e D o I F i nd E v e ry t h i n g I Ne e d f o r P r o c e s s Me a s u r e m e nt a n d C o nt r o l ? O ME G A … O f C ou r s e ! 900M124U00B TEMPERA TURE – Thermocouple, R TD & Thermistor Probes, Connectors, Panels & Assemblies – W ire: Thermocouple, R TD & Thermistor – Calibrators & Ice Point References – Recor[...]