Siemens SIMATIC HMI series - Unplugging the Connecting Cable

Fail-safe operation
9.2 Unplugging the connecting cable
Mobile Panels 2nd Generation
Operating Instructions, 09/2018, A5E33876626-AC
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9.2
Unplugging the connecting cable
Requirement
● A project is running on the Mobile Panel.
● For a PROFIsafe-based F-system:
The Mobile Panel is logged on to the F-CPU via the safety program.
Procedure
PROFIsafe-based F-system
NOTICE
Logoff required
In a PROFIsafe-based F-system, logoff from the safety program is required before
unplugging the connecting cable.
If you unplug the connecting cable without logoff, the plant will switch to a safe operating
state.
1. If you want to switch the Mobile Panel to another connection box, close the fail-safe
communication via the corresponding operator control.
If you want to shut down and switch off the Mobile Panel, close the currently active
project.
2. Confirm the logoff in the corresponding dialog.
The Mobile Panel is logged off the safety program. PROFIsafe communication stops after
a successful logoff.
3. When the emergency stop button no longer lights up, unplug the connecting cable.
Hardwired F-system
NOTICE
Connection box compact and connection box standard
When unplugging the connecting cable from the connection box compact or a connection
box standard, there is no automatic bypass of the emergency stop / stop circuit. Without
further actions, an emergency stop or stop is triggered in the plant and the plant switches to
a safe state.
Take appropriate circuitry measures to prevent an undesired emergency stop or stop of the
plant.
1. Unplug the connecting cable.
The emergency stop button is no longer active and no longer lights up.