I went ahead and used the Repeater Mode, but had no success. Data was Coming in and out thru the master plc, but intermittently 5-10 minute Lags.
I switched to Polling, and instantly had a better result. Data comes out great, fast, 1-10 seconds, but here it gets tricky:
I have a PLC Master Modbus using rs232, connected to xtend modem via rs232 too. The master PLC Reads/Writes to 2 Slaves PLCs using 1 radio each, and 1 Slave for data logging, Also using rs232 ports.
When the master PLC is set to WriteModbus Commands.. It works flawlessly... BUT. When I run the ReadModbus Commands... it doesn't Read... but continues to write.
Will this have anything to do with the Buffer Size on the Modem side?
Why will it Write, but not read to/from Slaves?
Does Polling Mode, work even if a Remote modem has no LOS with the Base Modem, but does have LOS with another remote modem? will data go thru?