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The common operating mode is called run mode.

Table 17: Run mode

LED

Display

Description

PWR LED = on

RUN LED = on

ERR LED = off

 ID_Run_PM56xx

Power supply is present. PLC is in run mode.

If the PLC is connected to the power supply, but does not operate, it is in stop mode. In stop mode, the processor module does not control the system.

Table 18: Stop mode

LED

Display

Description

PWR LED = on

RUN LED = off

ERR LED = off/on

 ID_Stop_PM56xx

E.g., after the download of an application, after a firmware update, an error occured or the PLC was stopped by the user, etc.