mont222

I tried it on one controller. I set port: 502 to socket 0, socket 2, socket 3 and enabled Modbus TCP on them. !!!Success!!! Two servers connected to the PLC, as well as another “Modscan” at the same time. Thanks for the advice!!! Sorry for the English, I used Google Translate

Official Unitronics Support offers the same solution, but also says that it has not tried it. I'll try and let you know.

Thanks a lot. I'll try if Visilogic doesn't complain. I also requested support and am waiting.

Let me make the question shorter: Does the Unitronics v570 controller (Slave, Modbus TCP/IP, Socket 3 default) support connection/communication/data exchange with two “Modbus Masters” over the same Socket (IP-address, Port: 502) simultaneously? If yes, what should I do to implement this? I ask because many other controllers we use support this.

At the same time, many other controllers integrated into SCADA via Modbus successfully connect to both servers, only Unitronics v570 connects to the one that polls first.

Redundant servers (upper level of process control systems, SCADA - WinCC 7.3, Modbus TCP/IP) must have the same configuration for each integrated device (IP-address, Port), otherwise the redundancy is lost. I tried both on port 502 and 20257 - the same. At the moment, so that the servers do not lose redundancy, the controllers are integrated into the upper level through the OPC servers, and only one of the servers receives the data. I would like to integrate them in a standard way using Modbus TCP/IP. PLC: E236456 V570-57-T20B-GR Modul: E214119 V200-18-E5B-H --- from PLC: ---- V570-57-T20 / V290-19-T20(E) O/S: 4.2(01) BOOT: 2.2(11) BINLIB: 1-1.10(01) FACTORY BOOT: 1.3(07)

Hello! Tell me, do I understand correctly that the Unitronics v570 controller, configured to communicate via Modbus with SCADA as a “Slave”, can connect via Modbus to only one server (SCADA - WinCC v7.3)? We use two redundant servers (master) in SCADA. The configuration of the device connected via Modbus on both servers must be the same, the connection state on both must be the same, otherwise the redundancy of the servers is lost, which is unacceptable. At the same time, many other controllers integrated into SCADA via Modbus successfully connect to both servers, only Unitronics v570 connects to the one that polls first.