If Communication Error Occurs Between Master Station And This Module - Mitsubishi Electric AJ65BT-D62 User Manual

11. TROUBLESHOOTING

11.5 If Communication Error Occurs between Master Station and This Module

"ERR." LED of master station flickers
Parameter
setting match system
configuration?
Y
Any of master
station link special registers
SW0080 to SW0083 (other
station data link status)
ON?
Y
Any of master
station link special registers
SW0098 to SW009B (repeated
station number status)
ON?
Y
Check the module corresponding
to the bit switched on.
Station number switch
setting correct?
Y
Corresponding module faulty
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If any repeated station number bit in any of the link special registers SW0098 to
SW009B (repeated station number status) switches on, check the high-speed counter
module of the corresponding station number in the following flowchart.
Troubleshooting flowchart used when the "ERR." LED of the master station flickers
N
Correct parameter setting
or system configuration.
N
Master station faulty
N
N
Correct station number switch setting.
Switch power on again
or turn on reset switch.
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Check the module corresponding
to the bit switched on.
N
Power on?
Switch power on.
Y
N
"POWER" LED lit?
Y
Is supply voltage
within specified range?
Corresponding module faulty
N
"RD" LED lit?
Y
Communication cable
wired correctly*1?
Corresponding module faulty
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11 - 4
MELSEC-A
Master side check
High-speed counter module side check
N
Set supply voltage to
Y
within specified range.
N
Correct communication cable wiring.
Y
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