12 - 7 12 - 7
12 TROUBLESHOOTING
MELSEC-ST
(2) When ERR. LED is flickering
When the ERR. LED of the power distribution module is flickering, check the
following LEDs and take corrective action.
(a) When SYS. LED is off (only the bus refreshing module)
Check item
Corrective action
Is 24VDC of SYS. input supplied?
Check whether the input voltage to the bus
refreshing module is within the rated range.
(b) When AUX. LED is off
Check item
Corrective action
Is 24VDC of AUX. input supplied?
Check whether the input voltage to the power
distribution module is within the rated range.
Summary of Contents for MELESEC-ST
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Page 23: ...A 21 A 21 MEMO...
Page 114: ...10 22 10 22 10 MOUNTING AND INSTALLATION MELSEC ST MEMO...
Page 125: ...11 11 11 11 11 EMC AND LOW VOLTAGE DIRECTIVE MELSEC ST MEMO...
Page 163: ...Index 2 Index 2 MEMO Ind...
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