I have a developing problem - little now, but getting bigger by the moment - with two supervisory-level controllers which are supposed to be communicating via Modbus over TCP/IP. Neither system supports operation as a Modbus TCP/IP slave, only as a master. I am not aware of any direct means to make two masters talk to each other. I do not want to have to revert to a serial link if at all possible and am looking for a solution, which brings me to my question:
What I'm lamely hoping is that there is a third party device which can act as a Modbus slave to both controllers and act as a bridge to pass information between between these systems, effectively a buffer where one master writes data to the device and the other master reads it out? I don't really want to use a PC for this, a solid-state solution would be much preferred. I have some half-formed idea about using a PLC for this but can see that being overkill.
Am I looking for something which doesn't exist?
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If we learn from our mistakes I'm getting a great education!
What I'm lamely hoping is that there is a third party device which can act as a Modbus slave to both controllers and act as a bridge to pass information between between these systems, effectively a buffer where one master writes data to the device and the other master reads it out? I don't really want to use a PC for this, a solid-state solution would be much preferred. I have some half-formed idea about using a PLC for this but can see that being overkill.
Am I looking for something which doesn't exist?
----------------------------------
If we learn from our mistakes I'm getting a great education!