Delta ASDA-A3 Series User Manual page 1202

ASDA-A3
AL180 Bus communication timeout
Checking method
and corrective action
How to clear the
alarm?
AL185 Bus hardware error
Trigger condition
and cause
Checking method
and corrective action
How to clear the
alarm?
AL186 Bus data transmission error
Trigger condition
and cause
Checking method
and corrective action
How to clear the
alarm?
Check if the communication is normal.
1.
Check if the wiring is correctly connected.
2.
NMT: reset node, OD 6040h [Bit 7] (Fault reset), or DI.ARST.
Condition: bus communication is cut off.
Cause: abnormal communication hardware.
Check if the communication cable is intact and firmly connected.
1.
Check the communication quality. It is suggested that you use common
2.
grounding and shielded cable.
For communication type models, check if the value of monitoring variable 120
3.
increases continuously.
NMT: reset node, OD 6040h [Bit 7] (Fault reset), or DI.ARST.
Bus data transmission error.
Check if the communication cable is properly connected and whether there is
1.
any noise interference. Replace the communication cable or eliminate the
noise if necessary.
There are an excessive number of slave stations and the communication cycle
2.
time is too short. Lengthen the communication cycle.
NMT: reset node, OD 6040h [Bit 7] (fault reset), or DI.ARST.
Troubleshooting
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