July 2010 11 – 143
PLC error markers
M 4668 CTRL key on HR 420 NC NC 340 422-09,
340 480-09
M 4670 Potentiometer on HR 420/ HR 5x0 active NC NC 340 49x-05
M 4680 Disable activation of the HR 420/ HR 5x0 PLC PLC 340 49x-04
M 4753 Write errors from PLC modules in the PLC log PLC PLC 340 422-09,
340 480-09
M 4754 Write diagnostic information in MYDEBUG.LOG PLC PLC 340 422-10,
340 480-10
Operand Description Set Reset As of SW vers.
Operand Description Set Reset As of SW vers.
M 4800 -
4999
Reserved markers for PLC error messages PLC NC/
PLC