Siemens SIMATIC 505 - Module Integrity Indicators

Software Interface
2-3
2.1.4
There are two LEDs on the front panel of the module:
• MOD GOOD indicates overall module integrity .
• RUN (Pgm/Run) indicates that the module is in run mode and the
following conditions are met:
– WY7 contains value 1 121
– No error status bits set in WX3.9
– PLC output disable = not disable
Module Integrity
Indicators