Siemens SIMATIC S7-1200 - Page 57

Getting started
2.3 Programming
S7-1200 Functional Safety Manual
Manual, 02/2015, A5E03470344-AA
57
Parameter assignment of the "AND logic operation" instruction
Inputs
Parameter
Data type
Description
Default
"Start" (I0.2)
Input 1
Bool
TRUE = Switch on output
FALSE
#EN_Safety Input 2 Bool Enable safety circuit FALSE
Parameter assignment of the "FDBACK" instruction
Inputs/outputs
Parameter
Data type
Description
Default
"Feedback" (I0.1) FEEDBACK Bool Readback input TRUE (No error
detected)
"F00016_F-
DQ4".QBAD
QBAD_FIO Bool QBAD signal from the fail-safe signal
module DB of output Q
1
FALSE (No error
detected)
TRUE
ACK_NEC
Bool
TRUE = Acknowledgment required
TRUE
"Acknowledge" (I0.0) ACK Bool User acknowledgement (via pushbut-
ton)
FALSE
T#500MS
FDB_TIME
Time
Readback time
T#0MS
"Motor" (Q16.0)
Q
Bool
Output
FALSE
—
ERROR
Bool
Readback error
FALSE
—
ACK_REQ
Bool
Acknowledgement prompt
FALSE
—
DIAG
Byte
Service information
B#16#0
1
In this example, this is the QBAD signal from the F-I/O DB of the SM 1226 F-DQ 4 x 24 VDC.