Configuration
4.4 S7 Distributed Safety
Fail-safe operation of the Mobile Panel 277F IWLAN
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Function Manual, 08/2008, 6AV6691-1FQ01-2AB0
● The block passes the states of the HMI device through F_DB_STATES to F_FB_RNG_n.
The following HMI device states are possible:
– "Integrated"
– "Removed"
– "Communication error"
– "Acknowledgement required"
QBAD monitors the output of the F-I/O for integrating and removing the HMI device.
● QBAD = 0: PROFIsafe communication is taking place between the HMI device and the
F-CPU.
● QBAD = 1: No PROFIsafe communication is taking place between the HMI device and
the F-CPU.
WARNING
Inadmissible automatic restart of the plant
The security program must ensure that after S7_MP_RES is set, automatic restart of the
plant is not possible. The operator must strictly ensure that he executes a separate
operator action to commence the restart.
Addresses of PII and PIQ
You can find the start addresses of PII and PIQ in the PROFIsafe settings of the HMI device
in HW Config.