Flexible Automation
Central processing unit ZS400
4-20
1070 072 143-101
4.4.2 Run
Behaviour of control in operating state Run:
D PLC program is executed
D I/O map is executed
D Failure contact at the power supply module is closed
Switching between Stop and Run can be done via:
D System bus
D Programming unit
D Switch Stop/Run switch on the front panel of the ZS400
. The Stop status can only be reset at the position where it was initiated.
In retention mode, the operating state Run is retained even after failure of
the power supply.
4.4.3 Lock output states
The operating state Lock output states is selected using the Lock output
states switch on the front panel on the ZS400 or is selected via the pro
gramming unit.
Behaviour of control in operating state Lock output states:
D PLC program is executed
D I/O map is 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 closed
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