Good day all. I working on a Wonderware to Ignition conversion. Water plant monitors several Generators (Modbus) that are currently accessed in Wonderware through a Modbus Bridge (Bridge is IP 192.168.110.150 and Generator is Modbus Unit ID 1). I can not establish a connection to it. Tried using 192.168.110.150:1 as the Hostname with no luck.
Has anyone connected to a modbus device behind another device (CEV or Digi bridge) successfully? I have several connections like this on the new system.
Any suggestions greatly appreciated.
Is the Modbus Bridge simply ethernet-to-serial? If so, there's no standard port number. You may need to use wireshark on the WW computer to see the traffic. Be aware that such simple bridges cannot accept multiple masters.
If the Modbus Bridge is an actual Modbus TCP to Modbus gateway, the standard port number is 502. Most modern Modbus gateways do allow multiple masters, but be aware that it can overload the system will too much serial traffic. (Moxa MB3k series has a good reputation.)
The unit ID and hostname are separate in Igntion. In Ignition, the hostname and port goes into the device settings, and the unit ID forms part of the OPC item path.
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