Hi All, we have successful bi-directional comm. with the f2424 via Modbus RTU. However when I change a value in DM[n] it holds for one scan and then reverts back to the original value. I see the value change on the LCD and in the monitor mode. I would like to use DM's as set point placements for PID control. Wrong application of DM's?
Very new to TRI. The ladder portion is easy enough. The TBasic is new to me. I can program all 4 lines to say "start", "stop" etc. associated with input or output change of state. I can't figure out how to display time and date when the plc is in idle. I feel I am missing something obvious...... Any help would be appreciated, Dave