19.2 PLC STATUS The PLC keeps track of its status, for internal use, as well as allowing use by the ladder logic. Some of the status flags available in PLC's are, - Communication errors - PLC power on, first scan - Data retention -- PLC restarts with same outputs stopped with - Battery low - Scan time too long error - I/O error -- problem with one of the I/O cards - etc.
The PLC keeps track of its status, for internal use, as well as allowing use by the ladder logic.
Some of the status flags available in PLC's are,
