Operation
EL6900 35Version: 2.2.0
4.4.8 TwinSAFE group signals
Fig.19: TwinSAFE group signals
TwinSAFE group inputs
Name Permitted type Description
RUN FB-Out
Standard-In
TRUE The function blocks assigned to the TwinSAFE group are executed.
When the input is not linked it is in the TRUE state
FALSE All of the TwinSAFE group assigned function blocks are at a STOP
state and thus all associated outputs are in a safe state.
ERR Ack FB-Out
Standard-In
All pending errors in the assigned function blocks and in the TwinSAFE
connections are acknowledged by the FALSE->TRUE->FALSE signal
sequence.
TwinSAFE group outputs
Name Permitted type Description
FB ERR TwinSAFE-Out
FB-In
Standard-Out
TRUE At least one assigned function block has an error
FALSE All assigned function blocks have no errors
COM
ERR
TwinSAFE-Out
FB-In
Standard-Out
TRUE At least one TwinSAFE connection of TwinSAFE group has an error
FALSE All TwinSAFE connections of the TwinSAFE group have no errors
OUT ERR TwinSAFE-Out
FB-In
Standard-Out
FALSE Always FALSE, since the EL6900 has no local outputs
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