Promotic
WikipediaLinkedInYoutubeTwitterFacebook

Communication with meters and regulators by the Orbit Merret company

The Orbit Merret s.r.o. company (www.merret.cz, Czech republic) develops, manufactures, services and sells the digital manel measurement devices, converters and sensors.
 
The devices manufactured by the Orbit Merret support Modbus protocol communication or a simple ASCII protocol. This goes, for example, for the following devices:
- PLC OMC 8000
- Multifunction input OM 402/502/602 with 4/5/6-character display
- 4-character universal PID regulator OM 402PID
 

Communication by Modbus protocol

For this communication in the PROMOTIC system can be used: PmModbusMr - Driver for communication by Modbus Master protocol.
For easy integration of this driver into the application it is handy to use:
- The listed devices support Modbus RTU protocol with default communication parameters:
- Parity: NO
- PLC OMC 8000 also supports the Modbus TCP/IP protocol.
- The whole shared memory is separated into holding registers 4xxxx with following addressing:
Register 40001 corresponds to address 0000 in command and in shared memory.
Register 40002 corresponds to address 0001 in command a to address %MW3.2 in shared memory.
Register 40003 corresponds to address 0002 in command a to address %MW3.4 in shared memory. etc.
- The data can be read/written by thefollowing Modbus functions:
- Functions for reading:
03-Read Holding Registers (Read Output Registers)
- Functions for writing:
06-Preset Single Register (Write 1 Register)
16-Preset Multiple Registers (Write n Registers)
 

Communication by ASCII protocol

For this communication in the PROMOTIC system can be used: PmChar - Driver for communication by user defined ASCII/BIN protocol.
For easy integration of this driver into the application it is handy to use:
© MICROSYS, spol. s r. o.Tavičská 845/21 703 00 Ostrava-Vítkovice