Operation
6.2 Typical applications
Fail-safe operation of the Mobile Panel 277F IWLAN
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Function Manual, 08/2008, 6AV6691-1FQ01-2AB0
6.2.6.2
Terminating "override" mode
Introduction
The "Override" mode can be closed by the operator or closed automatically by the safety
program of the F CPU.
Closed by the operator
The operator closes the "Override" mode with the following actions:
1.
The operator activates the override switch.
2.
The operator logs the HMI device off from the effective range.
Closing automatically
If the operator leaves the override range without activating the override switch, the override
mode is automatically closed by the safety program of the F CPU. The transponders are the
evaluated again for detection of the effective range. "Override" mode can only be activated
again if the override switch is reset by the operator.
Initial situation
"Override" mode is active.
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Action
Scenario 1:
The operator activates the override switch.
Scenario 2:
The operator leaves a protected zone.
Result of scenario 1:
"Override" mode is deactivated.
The transponders are evaluated again for detection of the effective range.
If the operator is outside the effective range when "Override" mode closes, the system reacts as
described in the section Exiting the effective range without log off (Page 94).
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