Flexible Automation
Central processing unit ZS400
4-19
1070 072 143-101
4.4 Operating states
The ZS400 distinguishes the following operating states:
D Stop
D Run
D Lock output states
D Firmware update
D Loading a PLC program from a memory card
D Storing a PLC program on a memory card
4.4.1 Stop
Behaviour of control in operating state Stop:
D PLC program is not executed
D All outputs are set to 0
D Buffering peripheral modules are at basic setting
D Failure contact at the power supply module is open
D The STOP LED lights up on the front panel of the ZS400
D 7segment display of the ZS400 reports:
D
Stop request via system bus
D Stop request from programming unit
D Stop request via Stop/Run switch on the front panel of
the ZS400
D xy For messages of a system module with Stop request,
see relevant module description
In retention mode, the operating state Stop is retained even after failure of
the power supply.
. The Stop status can only be reset at the position where it was initiated.
To Next Page
Loading...
