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Network 2
The activation of the "override" mode is controlled in this network.
"SR_Override" is set if the override switch is switched on, i.e. I11.0 = "1". "SR_Override" is
reset by a negative edge of the contact mat, i.e. I11.1 = "0". This is the case if the operator
leaves the override area without terminating the "override" mode. Only when the
"SR_Override" is set and the override switch is set to "on" is the "override" mode activated
with the F_FB_RNG.
At the same time, the F_FB_RNG monitors the signals "emergency stop", "global
rampdown", "local rampdown" and "shutdown". They are scanned in networks 3 to 6.
Fail-safe operation of the Mobile Panel 277F IWLAN
Function Manual, 08/2008, 6AV6691-1FQ01-2AB0
Application example: Safety Functions
A.3 Safety program S7 Distributed Safety
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