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Looking for some advice and encouragement on setting up an A1S comms module on RS485, using MELSEC A with InTouch SCADA.
On the module - I have the RUN led ON, the CPU led ON (but not flashing as the manual states?). The Rx led flashes when I request data but nothing comes back.
The PLC contractor reckons the module and PLC are OK - but they also have a RS232 module in another slot(communicating to another A1S) - is this module taking all the A1S resources?
Also the module has a 'computerlink' mode and an 'multi-drop' mode, and I have conflicting opinions on what I should/could use? Personally I can't see much difference?
On the module - I have the RUN led ON, the CPU led ON (but not flashing as the manual states?). The Rx led flashes when I request data but nothing comes back.
The PLC contractor reckons the module and PLC are OK - but they also have a RS232 module in another slot(communicating to another A1S) - is this module taking all the A1S resources?
Also the module has a 'computerlink' mode and an 'multi-drop' mode, and I have conflicting opinions on what I should/could use? Personally I can't see much difference?