Download S7 Distributed Safety Configuring and Programming

F-Libraries
Structure of DIAG
Bit no. Meaning
Possible causes of problems Remedies
Bit 0
Feedback time setting < 0
Set feedback time > 0
Feedback time setting is too
low
If necessary, set a higher
feedback time
Wiring fault
Check wiring of actuator and
feedback contact
Feedback error or incorrect
feedback time setting
(= state of ERROR)
Actuator or feedback contact is Check actuator and feedback
defective
contact
I/O fault or channel fault of
feedback input
Check I/O
Bit 1
Passivation of F-I/O controlled
by output Q
(= state of QBAD_FIO)
F-I/O fault, channel fault, or
communication error, or
passivation by means of
PASS_On of F-I/O
For solution, see DIAG
variable, Bits 0 to 6 in F-I/O DB
Bit 2
Following feedback error:
feedback input has permanent
signal state of 0
II/O fault or channel fault of
feedback input
Check I/O
Feedback contact is defective
Check feedback contact
F-I/O fault, channel fault, or
For solution, see DIAG
communication error, or
variable, Bits 0 to 6 in F-I/O DB
passivation by means of
PASS_On of F-I/O of feedback
input
Bit 3
Reserved
-
-
Bit 4
Reserved
-
Bit 5
If feedback error: input ACK has Acknowledgment button
a permanent signal state of 1
defective
Check acknowledgment button
Wiring fault
Check wiring of
acknowledgment button
Bit 6
Acknowledgment necessary
(= state of ACK_REQ)
-
-
Bit 7
State of output Q
-
-
Note
Access to the DIAG output is not permitted in the safety program!
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S7 Distributed Safety, Configuring and Programming
A5E00109537-02