PLC|RS485 PLC to write the key

RS485 communication speed up to 115200bps (bits per second)
115200bps/1000 = 115.2bp (ms)

Data string = begin code + data (7-8 bit) + Check code + end code = 11bit


115.2bp (ms) / 11bit = 10.5 data streams / ms


The existing PLC scan time of about 4-20ms, in fact, are much larger than thecommunication speed of RS485.

So the PLC simplified way, so at least the number of scans, you can complete thetransmission & reception,
Is the biggest key.