While a T100MD PLC is running, a host computer send ASCII string commands to it to read or write to its inputs, outputs, relays, timers, counters and all the internal variables. The serial port settings of T100MD PLC for host-link communication are : 38400 baud, 8 data bit, 1 stop bit, no parity. If a host computer send ASCII string commands to T100MD PLC, it responds 'Warning: No Response from PLC'...
Why not? Answer me.....