Troubleshooting Flowcharts
Section 5-2
Alarm Check Flowchart
Although the PC does not stop when the ALARM indicator lights, check and cor
-
rect such errors as soon as possible.
A
NO
ALARM indica
-
End
tor lights?
YES
Connect peripheral device
and check error
(A40215 ON)
YES
YES
YES
YES
YES
System error
(FAL)?
Check FAL No. with word
A430 to A461 and remove
cause of error
NO
JMP error?
NO
(A40213 ON)
Destination of JMP is
missing
(A40212 ON)
Indirect DM
BCD error?
Contents of indirectly ad
-
dress are not BCD
NO
(A40211 ON)
Non-fatal SFC
error?
Check program of SFC
NO
(A40210 ON)
Rack power
failure?
Check Racks recognized
by CPU with word A419
and turn ON power to
Rack No. whose bits are
OFF
NO
(A40209 ON)
YES
I/O Unit has been re
-
I/O verify error?
NO
moved. Check I/O Units by
verifying I/O table. Correct
ly mount Units, or create
I/O table
-
B
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A
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