Siemens SIMATIC S7 - Flowchart of Channel-Related Diagnostics

5-9
SM 338 Equipment Manual
(4) J31069-D401-U1-A0-7618
Channel-related diagnostics is performed as shown in the flowchart below.
Diagnosis
alarm to CPU
YES
Error on
channel x?
NO
YES
“SF” LED on
Wire break?
NO
Other channel
error?
NO
Channel-
related diagnostics
and monitoring en-
abled?
NO
Channel-
related diag-
nostics en-
abled?
NO
Entryinbyte7
(channel error
vector), and
bytes 8 to 11?
Update system
diagnosis bytes
(channel error).
YES
YES
Diagnosis
alarm en-
abled?
NO
End
YES
Entryinbyte7
(channel error
vector), and
bytes 8 to 11?
Parameter
area
Diagnosis
area
YES
Figure 5-1 Flowchart of channel-related diagnostics
-
Flowchart of chan-
nel-related diag -
nostics
O
p
e
r
a
tion