Interface description R2600 / R2601 DIN Draft 19244 Interface 3-348-815-15 6/11.
CONTENTS Page Page 1 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 ...................................
GOSSEN METRAWATT GMBH 4 1 General 1.1 Interface hardware To communicate with a host computer, an SPS, etc., the controllers R2600 / 01 must be equipped with marking F1.
1.3 How to connect the interface 1.3.1 RS-232 connection When using the a RS-232 interface, only one R2600/01 can be connected to a master (e.g. PC), for example, for pre-loading the unit with user-specific data. Sub-D socket R2600/01 Number of pins: 25 9 DCD 8 1 RxD 3 2 20 TxD TxD 2 3 21 RxD DTR 20 4 Gnd 7 5 19 Gnd DSR 6 6 RTS 4 7 CTS 5 8 Depending upon the driver software, the jumpers on the master side can be omitted and/or can be different.
GOSSEN METRAWATT GMBH 6 1.3.2 RS-485 connection When using a RS-485 interface, as many as 32 equipment (R2600/01 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 connection. With longer bus lines (longer than about 5 m) the bus should be terminated at both ends with the characteristic impedance (e.g. 200 Ω between A and B).
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 av) has elapsed. Within a telegram, pauses of limited duration (t zv = character delay time) may occur between 2 character transmissions. 1.
GOSSEN METRAWATT GMBH 8 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 R2600/01. 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) • for transmission of short instructions to the equipment (e.g. Reset) • for short requests of important data from the equipment (e.g.
2.2 Control set The R2600/01 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. Contents Meaning 1 68h Start character 2 3 and/or 6 Length 3 3 and/or 6 Length (repeat) 4 68h Start character (repeat) 5 0 ...
GOSSEN METRAWATT GMBH 10 2.3 Long set The R2600/01 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 1 68h Meaning Remark Start character 2 Length 3 Length (repeat) 4 68h Start character (repeat) 5 0 ... FAh, FFh Equipment address Number of characters from equipment address to checksum exclusive Addr and/or 255 (see 2.4.
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. 2.4.
GOSSEN METRAWATT GMBH 12 2.4.2.2 Function coding of the function field (FF) in response direction Bit No. Function Value 0 ...
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 Bit 3-0 0 ... Fh 0 ... Fh Selection number for main parameter group Selection number for a special parameter in the main group Functionally used data and/or setting parameters of an equipment are combined in the main parameter groups.
GOSSEN METRAWATT GMBH 14 2.5 Criteria for the validity of a request telegram The R2600/01 checks the characters of the telegrams received in accordance with the following tables: For short set: For control and long set: Character No. Criterion Character No. Criterion 1 10h 1 68h 2 Interface address Addr or 255 (see 2.4.
3 Telegram contents R2600/01 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): R2600/01 response: 10h 02h 09h 0Bh FF PS 16h None 3.
GOSSEN METRAWATT GMBH 16 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): 10h R2600/01 response (long set, see 2.3): 68h 02h 09h 89h 8Bh FF PS 09h 68h 16h 02h „FF“ Data block 7 characters See 2.4.2.
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). Example: Equipment address = 5 Request from master (short set): 10h 05h A9h AEh 16h R2600/01 response (long set, see 2.
GOSSEN METRAWATT GMBH Character 1. Bit No. 18 Meaning Display on equipment Remark 0 Sensor breakage measuring circuit 2 1 Wrong polarity measuring circuit 2 2 Analog error 3 Sensor breakage measuring circuit 1 4 Wrong polarity measuring circuit 1 5 Low limit 1 fallen below 6 Low limit 2 fallen below 7 High limit 1 exceeded 8 High limit 2 exceeded 9 Impermissible parameter, see 2.
0 Sensor error position readback 1 Sensor error heating current 2 3 3. 4 Heating current not "off" with positioning signal switched off 5 Heating current < 80 % of the set point of the heating current with active positioning signal 6 7 8 EEPROM error 9 4.
GOSSEN METRAWATT GMBH 20 3.5 Request data from R2600/01 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. Thus the characters "from/to channel" and "receipt No." in the control and long set are omitted.
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 R2600/01 with address = 33 = 21h (see 4.1) Request from master (control set, see 2.2): 68h 06h 06h 68h 21h 89 07h FF PI „FF“ 07h 01h 01h 00h B3h 16h PS Equipment response (long set, see 2.
GOSSEN METRAWATT GMBH 22 3.6 Send data to R2600/01 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.
Acknowledgement from equipment (short set): 10h 00h „FF“ „FF“ 16h PS 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. 3.6.2 Send a control parameter, for example The parameter index (PI) is not 3xh, thus the characters "from/to channel" and "receipt No." = 1, 1, 0 are contained in the long set.
GOSSEN METRAWATT GMBH 24 4 Parameter indices of the equipment parameters For a request and/or transmission of data from and/or to the R2600/01, 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.
03h Second set point ± 15 bits (4.1.2) SP L ... SP H 04h High limit for relay A2 ± 15 bits (4.1.2) Same as PI = 01h Same as PI = 01h 05h Low limit for relay A2 ± 15 bits (4.1.2) Same as PI = 01h Same as PI = 01h 06h Low set point ± 15 bits (4.1.2) X1 ... SP H For fixed value controller, slave controller –MBU/2 ... SP H For differential controller 07h High set point ± 15 bits (4.1.2) SP L ... X2 For fixed value controller, slave controller SP L ...
GOSSEN METRAWATT GMBH 26 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 – the configured unit of the sensor (see PI = 32h). Marking Sensor type 0 ... 7 8 B1, B3, B4 1°C / 1°F 0.1°C / 0.1°F B2, B5 1, 0.1, 0.01, 0.001 With standard signal (B2, B5) and Pt100 with 0.
4.1.3 Table of measuring ranges Sensor type Code Kind Type Lower range limit X1 Upper range limit X2 in °C in °C in °F in °F Range span MBU in °C in °F 0 J –18 0 850 1562 868 1562 1 L –18 0 850 1562 868 1562 2 K –18 0 1200 2192 1218 2192 B 0 32 1820 3308 1820 3276 4 S –18 0 1770 3218 1788 3218 5 R –18 0 1770 3218 1788 3218 6 N –18 0 1300 2372 1318 2372 7 1° display –100 –148 500 932 600 1080 –100.0 –148.0 500.0 932.0 600.0 1080.
GOSSEN METRAWATT GMBH 28 4.2 Control parameters The control parameters are listed in the main parameter index group 1. 4.2.1 Table of the control parameters PI Unit Setting range 10h Proportional band Heat Parameter 16 bits 0.1% 1 ... 9999 11h Proportional band Cool 16 bits 0.1% 1 ... 9999 12h Deadband 16 bits (4.1.2) 0 ... MBU 14h Delay time of the controlled system 16 bits 1s 0 ... 9999 15h Output cycle time 16 bits 0.5 s 1 ... 1200 ± 7 bits 1% –100 ...
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 PI Unit Setting range 20h Control status control channel Parameter Format 16 bits Bit field See 4.3.2 21h Error status Control loop / HÜ (htg. current monitor) / equipment 2x16 bits Bit field See 3.
GOSSEN METRAWATT GMBH 30 4.3.2 Control status controller channel (PI = 20h): Bit No.
4.3.3 Configuration of the 2nd signal input (PI = 22) Code 0 1 2 3 4 5 6 7 Function signal input 2 B4 B5 Fixed value controller (internal set point) Differential controller Fixed value controller Differential controller – Slave controller – – Fixed value controller – Fixed value controller Differential controller – Slave controller – B3 GOSSEN METRAWATT GMBH Standard signal 2 B4, B5 0 ... 20 mA 0 ... 10 V 4 ... 20 mA 2 ...
GOSSEN METRAWATT GMBH 32 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 PI Parameter Format Setting range Remarks 26h Read only (4.4.2) Read only 8 bits (4.4.3) CnF1, 4th digit 2x8 bits (4.4.4) CnF1, 3rd digit e.g. 18h = version 1.
4.4.2 Marking identifications (PI = 31h) Bit No. Value 2 ... 0 001 100 101 111 Meaning A4 A1 A2 A3 5 ...
GOSSEN METRAWATT GMBH 34 4.4.3 Configuration: Sensor unit, continuous output (PI = 32h) Code Sensor unit 1) Continuous output Output range 0 °C °F 1 2 °C °F 3 4 °C 5 6 8 0Ah 0Bh 0Fh 0 ... 20 mA 0 ... 10 V °F 4 ... 20 mA 2 ... 10 V °F 0 ... 20 mA 0 ... 10 V °F 4 ... 20 mA 2 ... 10 V °C 9 4 ... 20 mA 2 ... 10 V °F °C 7 0 ... 20 mA 0 ...
4.4.4 Sensor type, B marking (PI = 33h) 1st character = sensor type: Code 2nd character = B marking: Value Sensor type 1) Type Kind Condition Meaning 0 B5 0 J 1 B4 1 L 3 B3 6 B2 7 B1 2 K 3 B 4 S 5 R 6 N 7 1° 8 0,1° display display 0 0 ... 20 mA / 0 ... 10 V 1 4 ... 20 mA / 2 ...
GOSSEN METRAWATT GMBH 4.4.5 36 Configuration of alarms 1 / 2 (PI = 36h) Bit No. 3 ...
6 ... 4 7 Alarms 2 0 Relative 1 Absolute 2 Relative 3 Absolute 4 Relative 5 Absolute 6 Relative 7 Absolute Inactive NOC Active Inactive NCC Active 0 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.
GOSSEN METRAWATT GMBH 38 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 R2600/01.
5.2 Send a record The long set for sending to the R2600/01 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 R2600/01, the equipment address must be adapted (5th character). Following, the checksum (last but one character) must be corrected. Send from master (control set, e.g.
Edited in Germany • Subject to change without notice • A pdf version is available on the internet GOSSEN METRAWATT GMBH Thomas-Mann-Str. 16-20 90471 Nürnberg, Germany Phone +49-(0)-911-8602-0 Fax +49-(0)-911-8602-669 E-Mail: info@gmc-instruments.com www.gmc-instruments.
