Communication with Landis&Gyr regulators

Communication by OPC server by the MC Control company

The OPC server from this company is communication driver for devices Landis&Gyr of the type UNIGYR–RWP80 and PRU2 10.64b. Regulators can be connected via the computer's serial port RS232 or via Ethernet. OPC server installer is available on pages http://www.mccontrol.cz. OPC server is protected by HW Key. Without HW Key is server limited for one station for one hour.

Data transfer via RS232 interface:
Data transfer RS232 allows connecting max one station RWP80 connected to serial port. Connecting other station requires new communication port.

Data transer via Ethernet:
The station is connected through communication converter Ethernet/RS-232. It is possible to connect more station to one TCP port, address is determined by IP address in network.

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Communication by OPC server for PROFIBUS

It is possible to insert the PROFIBUS communication card into the controler of the PRU type. By such controller it is possible to communicate, for example, by the OPC server by the Siemens company.

Communication with PRV1 and PRV2 regulators

The communication with the Landis&Gyr regulators of the PRV1 and PRV2 types is carried out in the PROMOTIC system by means of the PmChar communication driver. For the network communication (over the RS485) it is necessary to equip each Landis&Gyr station by the addressable HW converter.

Point-to-point communication:
The Landis&Gyr regulator can be programmed as the communication Slave (i.e. it waits for communication prompts=messages from the PC). This is the most often and recommended case how to implement the communication of an application with the Landis&Gyr stations. The Landis&Gyr regulator can be programmed as the Master as well (it transmits data to the communication line itself); or it can go about the combination of both approaches.
As a demonstration of the point-to-point communication example is available, where the PC is of the Master type and the Landis&Gyr station is of the Slave type. See: Preconfiguration "PmChar - Communication with Landis&Gyr regulators PRV1". Example is implemented by the PmChar communication driver.

Network communication:
The communication with the Landis&Gyr stations of the PRV1 and PRV2 types can be driven on the RS485 line by intelligent HW converters that provide:

Communication with PRU1/PRU2/RWP regulators by means of DLL library

The communication with the Landis&Gyr regulators of the PRU1, PRU2 and RWP types is implemented over the RS485 industrial network interface by the addressable HW converter and the SW communication driver (DLL library) as follows:
1st On the Landis&Gyr station side the communication is carried out over the PG port (RS232). Prior to each Landis&Gyr station the intelligent HW converter must be located. The HW converter performs:
2nd On the PC side there is available the communication driver (DLL library). The PROMOTIC system accesses the DLL library by the PmaDll object and calls its functions (data reading, data writing, etc.). The communication driver keeps the internal database of variables. This provides quick answers to PROMOTIC system requests because it doesn't wait for reading the real value from the Landis&Gyr but the value read from the internal database is returned. For the RS232/RS485 conversion a suitable external HW converter or a HW card into the PC can be used. On using the HW communication card in the PC the condition of the functionality is the correct detection of the HW card in the Windows OS (showing new COM ports in the Windows OS settings).

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