Gossen MetraWatt R2600 Interface Description
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Gossen MetraWatt R2600 Interface Description

Gossen MetraWatt R2600 Interface Description

Din draft 19244 interface
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Interface description
R2601
3-348-815-15
DIN Draft 19244 Interface
7/6.10

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Summary of Contents for Gossen MetraWatt R2600

  • Page 1 Interface description R2601 3-348-815-15 DIN Draft 19244 Interface 7/6.10...

  • Page 3: Table Of Contents

    INHALT General ... 4 1.1 Interface hardware ... 4 1.2 Communications protocol ... 4 1.3 How to connect the interface ... 5 1.4 Principal function ... 6 1.5 Time action... 7 Telegram structure... 8 2.1 Short set... 8 2.2 Control set... 9 2.3 Long set ...

  • Page 4: General

    GMC-I Messtechnik GmbH 1 General 1.1 Interface hardware To communicate with a host computer, an SPS, etc., the controller R2601 must be equipped with marking F1. In this case, the controllers are equipped with a serial interface having the following data: ...

  • Page 5: How To Connect The Interface

    1.3 How to connect the interface 1.3.1 RS-232 connection When using the a RS-232 interface, only one R2601 can be connected to a master (e.g. PC), for example, for pre-loading the unit with user-specific data. Sub-D socket Number of pins: Depending upon the driver software, the jumpers on the master side can be omitted and/or can be different.

  • Page 6: Principal Function

    GMC-I Messtechnik GmbH 1.3.2 RS-485 connection When using a RS-485 interface, as many as 32 equipment (R2601 and others) can be connected to the bus. Thereby, all terminals A, B and/or C are interconnected in parallel. The wiring must be made from equipment to equipment and must not be a star con- nection.

  • Page 7: Time Action

    Following, the master may only become active again, when – it receives a reply telegram from the addressed equipment and the specified wait time after a reply telegram (t aw) has elapsed, or – the maximum specified response delay time (t Within a telegram, pauses of limited duration (t 1.5 Time action Ready to send/receive after turn-on...

  • Page 8: Telegram Structure

    GMC-I Messtechnik GmbH 2 Telegram structure All telegrams consist of one of 3 sets in both request and reply direction, they differ in their principal structure. Their use is fixed for each interface function of the R2601. Structure and use of the set types are described as follows. 2.1 Short set Short sets are used on the request side (from the master) ...

  • Page 9: Control Set

    2.2 Control set The R2601 uses control sets on the request side only. They serve to request all equipment data that cannot be requested via a short set because a detailed specification is required for them. Principal construction control set Character No.

  • Page 10: Long Set

    GMC-I Messtechnik GmbH 2.3 Long set The R2601 uses long sets to transmit instructions and parameters to the equipment and to receive data from the equipment. Principal construction long set Character No. Contents Meaning Start character Length Length (repeat) Start character (repeat) 0 ...

  • Page 11: Function And Value Range Of The Format Characters

    2.4 Function and value range of the format characters 2.4.1 Equipment address  0 ... 250 Range for individual equipment addresses = interface address Addr  255 All equipment connected to a bus can simultaneously be addressed under this address. Data and instructions entered with this address are accepted by all equipment, but there is no acknowledgement made to the master.
  • Page 12 GMC-I Messtechnik GmbH 2.4.2.2 Function coding of the function field (FF) in response direction Bit No. Function 0 ... 2 Reserved Request disable Instruction acknowledgement Transmission error Not used Service request Value Meaning 0, 0, 0 (fixed) Instruction executed, equipment ready Equipment not ready for this instruction, eventually repeat instruction Instruction executed, equipment ready Instruction could not be executed, equipment ready...
  • Page 13 2.4.3 Parameter index (PI) The type of the data to be transmitted is defined via the parameter index. The "PI" character is interpreted as follows: Bit 7-4 0 ... Fh Selection number for main parameter group Functionally used data and/or setting parameters of an equipment are combined in the main parameter groups. Only those parameter indices docu- mented in section 4 can be addressed in the R2601, an error message is issued for all others.

  • Page 14: Criteria For The Validity Of A Request Telegram

    GMC-I Messtechnik GmbH 2.5 Criteria for the validity of a request telegram The R2601 checks the characters of the telegrams received in accordance with the following tables: For short set: Character No. Criterion Interface address Addr or 255 (see 2.4.2) FF = valid function coding PS = Addr or 255 + FF 1) Bytewise sum without overflow over all characters from equipment address (Addr or 255) to checksum exclusive...

  • Page 15: Telegram Contents R2601

    3 Telegram contents R2601 3.1 Equipment reset The addressed equipment performs a hardware reset same as in the case of a short interruption of the auxiliary voltage. Example: Equipment address = 2 Request from master (short set): R2601 response: 3.2 Interrogation: Equipment OK? The addressed equipment shows the function field only: Example: Equipment address = 3 Request from master (short set):...

  • Page 16: Request For Cycle Data

    GMC-I Messtechnik GmbH 3.3 Request for cycle data You will get the most important measuring and output values of the controller in one data package. Cyclic requests of these values are thus made possible in compact form (short set request. Example: Equipment address = 2 Request from master (short set): R2601 response (long set, see 2.3):...

  • Page 17: Request For Event Data

    3.4 Request for event data The event date, combined in 2 words, contain all error messages and alarms of the equipment. They can be called up via short set to identify a special error. This request can be made asynchronous, for example, if the service request bit (collected errors) was set before in any random response telegram in the function field (FF).
  • Page 18 GMC-I Messtechnik GmbH Character Bit No. Meaning Sensor breakage measuring circuit 2 Wrong polarity measuring circuit 2 Analog error Sensor breakage measuring circuit 1 Wrong polarity measuring circuit 1 Low limit 1 fallen below Low limit 2 fallen below High limit 1 exceeded High limit 2 exceeded Impermissible parameter, see 2.5 Error in heating circuit...
  • Page 19 Sensor error position readback Sensor error heating current Heating current not "off" with positioning signal switched off Heating current < 80 % of the set point of the heating current with active positioning signal EEPROM error Function error of rotary button Error of measured value calibration Invalid combination of markings 1) These error bits are deleted after reading.

  • Page 20: Request Data From R2601

    GMC-I Messtechnik GmbH 3.5 Request data from R2601 This communication makes it possible to request all values, parameters, configurations, states and equipment markings. Thereby, the data is individually addressed per parameter index. See section 4 for the complete list of all parameter indices. 3.5.1 Request an equipment specification The parameter index lies between 30h and 3Fh.
  • Page 21 3.5.2 Request for a temperature parameter, for example The parameter index is not 3xh, thus the characters "from/to channel" and "receipt No." = 1, 1, 0 are contained in the control and long set. Example: Request for the maximum selectable set point (SP H ) of the R2601 with address = 33 = 21h (see 4.1) Request from master (control set, see 2.2): Equipment response (long set, see 2.3): See 2.4.2.2 for the contents of the function field (FF)

  • Page 22: Send Data To R2601

    GMC-I Messtechnik GmbH 3.6 Send data to R2601 This communication makes it possible to set all parameters, configurations and operating states which can be changed via operation. Thereby, the data is individually addressed per parameter index. See section 4 for the complete list of all parameter indices. There is no protection against overwriting. The settings of the DIP switches for disabling of the configuration and/or parameter setting are of no importance.
  • Page 23 Acknowledgement from equipment (short set): See 2.4.2.2 for the contents of the function field (FF) The first character of the data block is the configuration "sensor type". The second character (B marking) cannot be stored, but a character (any, e.g. 00h) must be sent.

  • Page 24: Parameter Indices Of The Equipment Parameters

    GMC-I Messtechnik GmbH 4 Parameter indices of the equipment parameters For a request and/or transmission of data from and/or to the R2601, not only the parameter index for the individual data but also the format and thus the length of the data block in the long set are of interest. From the column "Format" of the parameter tables and section 2.4.4, the number, order and contents of the characters of the data block can be found.
  • Page 25 04h High limit for relay A2 05h Low limit for relay A2 06h Low set point 07h High set point 08h Lower range limit standard signal 09h Upper limit standard signal 0Ch Calibration actual value 0Dh Location of decimal point 0Eh Ramp for rising set points 0Fh Ramp for falling set points 1) The decimal point is for the display on the R2601 only, not for the parameter values.
  • Page 26 GMC-I Messtechnik GmbH 4.1.2 Unit of the temperature parameters The unit of the temperature parameters depends upon – the range marking B1 ... B5 of the equipment (see PI = 33h), – the configured sensor type (see PI = 33h) and –...
  • Page 27 4.1.3 Table of measuring ranges Sensor type Code Kind Type 1 display Pt100 0.1 display 0 ... 20 mA / 0 ... 10 V Standard signal 4 ... 20 mA / 2 ... 10 V GMC-I Messtechnik GmbH Lower range limit X1 Upper range limit X2 in °C in °F...

  • Page 28: Control Parameters

    GMC-I Messtechnik GmbH 4.2 Control parameters The control parameters are listed in the main parameter index group 1. 4.2.1 Table of the control parameters Parameter 10h Proportional band Heat 11h Proportional band Cool 12h Deadband 14h Delay time of the controlled system 15h Output cycle time 16h Regulation ratio for positioner mode 18h Motor running time...

  • Page 29: Control Instructions

    4.3 Control instructions The control instructions in main group 2 of the parameter index define the control action of the equipment 4.3.1 Table of the control instructions Parameter 20h Control status control channel 21h Error status Control loop / HÜ (htg. current monitor) / equipment 22h Configuration 2nd signal input...
  • Page 30 GMC-I Messtechnik GmbH 4.3.2 Control status controller channel (PI = 20h): Bit No. Value Meaning Controller type = Limit monitor Positioner Two-state controller Heat / continuous controller falling characteristic Two-state controller Cool / continuous controller rising characteristic 2 - 0 Three-state controller / split range controller Three-state controller Water cooling Step controller...
  • Page 31 4.3.3 Configuration of the 2nd signal input (PI = 22) Function signal input 2 Code Fixed value controller (internal set point) Differential controller – – – – – – GMC-I Messtechnik GmbH Fixed value controller Differential controller Slave controller Fixed value controller Fixed value controller Differential controller Slave controller...

  • Page 32: Equipment Specifications

    GMC-I Messtechnik GmbH 4.4 Equipment specifications The equipment specifications in main group 3 of the parameter index among others include marking identification, software version and some configurations. 4.4.1 Table of equipment specifications Parameter 30h Equipment marking 31h Marking identification 32h Configuration Sensor unit, continuous output 33h Sensor type, B marking 35h Software version...
  • Page 33 4.4.2 Marking identifications (PI = 31h) Bit No. Value Meaning 2 ... 0 5 ... 3 Series version OEM version of hardware and software GMC-I Messtechnik GmbH Remark Different from PI = 33h...
  • Page 34 GMC-I Messtechnik GmbH 4.4.3 Configuration: Sensor unit, continuous output (PI = 32h) Code Sensor unit Output range C 0 ... 20 mA F 0 ... 10 V C 4 ... 20 mA F 2 ... 10 V C 0 ... 20 mA F 0 ...
  • Page 35 4.4.4 Sensor type, B marking (PI = 33h) 1st character = sensor type: Code Sensor type Type Thermocouple 1 display 0,1 display 0 ... 20 mA / 0 ... 10 V Standard signal 4 ... 20 mA / 2 ... 10 V 1) A change influences the presentation of the temperature parameters GMC-I Messtechnik GmbH Kind...
  • Page 36 GMC-I Messtechnik GmbH 4.4.5 Configuration of alarms 1 / 2 (PI = 36h) Bit No. 3 ... 0 Start-up suppression Code Relative Inactive Absolute Relative Active Absolute Relative Inactive Absolute Relative Active Absolute Relative Inactive Absolute Relative Active Absolute Relative Inactive Absolute Relative...

  • Page 37: Heating Current Monitor

    Relative Inactive Absolute Relative Active Absolute Relative Inactive Absolute Relative Active Absolute 1) A change between relative and absolute changes the numeric values of the high and low limits. 4.5 Heating current monitor Main group 6 of the parameter index includes the parameters for heating current monitoring. 4.5.1 Table of the parameters for the heating current monitor Parameter 60h Set point of the heating current...

  • Page 38: Storage Operations

    GMC-I Messtechnik GmbH 5 Storage operations To store all parameter and configuration data of an equipment, it is not required to address all data individually via parameter indices. It is possible instead to directly read and/or write all data stored in the non-volatile data memory (EEPROM) in one record. This function serves to save the data, to quickly load or duplicate user-specific settings to the R2601.

  • Page 39: Send A Record

    5.2 Send a record The long set for sending to the R2601 can practically only be generated from the received long set at the request of a record. The function field (6th character) in 69h (write data) must be changed for that purpose. When copying to another R2601, the equipment address must be adapted (5th char- acter).
  • Page 40 Edited in Germany • Subject to change without notice • A pdf version is available on the internet GMC-I Messtechnik GmbH Südwestpark 15 90449 Nürnberg • Germany Phone +49 911 8602-111 +49 911 8602-777 E-Mail info@gossenmetrawatt.com www.gossenmetrawatt.com...

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