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Application example: Safety Functions
A.3 Safety program S7 Distributed Safety
Network 3
In network 3 the emergency stop signal of the HMI device is monitored via the F_ESTOP1
from the F-library of S7 Distributed Safety. The F_ESTOP1 ensures that the plant is only
able to restart following an emergency stop after acknowledgment by the operator via the
input "ACK".
Note
Also note the instructions for the FB 215 in the online help for the F-FBs and in the manual.
"SIMATIC S7 Distributed Safety - configuring and programming", Chapter
"FB 215 "F_ESTOP1". Emergency STOP up to Stop Category 1".
Network 4, network 5 and network 6
In network 4, 5 and 6 the signals for a global and a local rampdown and shutdown are
processed further. As the configuration of the monitored plant determines which responses
have to occur following occurrence of a particular safety state, these networks are not
explained in detail in this example.
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Fail-safe operation of the Mobile Panel 277F IWLAN
Function Manual, 08/2008, 6AV6691-1FQ01-2AB0
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