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5. TROUBLESHOOTING
MELSEC-A
5.
'
-
TROUBLESHOOTING
This chapter describes a brief troubleshooting procedure to communi-
cate with the transmission converter.
Check the lines or communicating relationship in the master unit for
abnormality first. If any abnormality is found, open the cover of the
transmission converter.
For any trouble relating to the master unit, refer to the User's Manual
for the relevant master unit.
5.1
When "POWER" LED is OFF
5.2
When SDIRD LED is full-ON or OFF
Check item
Is 24V DC power is supplied?
Corrective action
Check the external cabling.
If all the above check items are normal, H/W may be abnormal.
Please contact your nearest MlTSUBlSHl representative with
details of the trouble.
Check item
Is any cable broken w~thin the loop?
Is the cable connected properly?
Corrective action
Check the cabling..
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