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9 TROUBLESHOOTING
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(3) H/W Information
(a) H/W LED information
The LED ON/OFF states of the QJ71PB93D are displayed.
For the value of each item, "0001" indicates ON and "0000" OFF.
Item
RUN
ERR.
DIA
BF
TEST
SYNC
FREEZE
Description
ON : Normal
OFF: Hardware error (module watchdog timer error)
ON : Parameter setting error or module error occurrence
OFF: Normal
ON : Extension trouble information present
OFF: Extension trouble information absent
ON : Before data communication or communication
error detection
OFF: During data communication
ON : During self-diagnostic execution
ON : During SYNC mode
ON : During FREEZE mode
MELSEC-Q
9 - 5
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