Siemens SIMATIC S7 Functional Safety Manual page 57

Parameter assignment of the "AND logic operation" instruction
Inputs
"Start" (I0.2)
#EN_Safety
Parameter assignment of the "FDBACK" instruction
Inputs/outputs
"Feedback" (I0.1)
"F00016_F-
DQ4".QBAD
TRUE
"Acknowledge" (I0.0)
T#500MS
"Motor" (Q16.0)
—
—
—
In this example, this is the QBAD signal from the F-I/O DB of the SM 1226 F-DQ 4 x 24 VDC.
1
S7-1200 Functional Safety Manual
Manual, 02/2015, A5E03470344-AA
Parameter Data type
Input 1 Bool
Input 2 Bool
Parameter Data type
FEEDBACK Bool
QBAD_FIO Bool
ACK_NEC Bool
ACK Bool
FDB_TIME Time
Q Bool
ERROR Bool
ACK_REQ Bool
DIAG Byte
Description
TRUE = Switch on output
Enable safety circuit
Description
Readback input
QBAD signal from the fail-safe signal
module DB of output Q
1
TRUE = Acknowledgment required
User acknowledgement (via pushbut-
ton)
Readback time
Output
Readback error
Acknowledgement prompt
Service information
Getting started
2.3 Programming
Default
FALSE
FALSE
Default
TRUE (No error
detected)
FALSE (No error
detected)
TRUE
FALSE
T#0MS
FALSE
FALSE
FALSE
B#16#0
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