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MELSEC-Q
4 INSTALLATION, WIRING AND MAINTENANCE OF THE PRODUCT
(2) The LED display indicates the following operation statuses of the QD75MH and
axes.
QD75
MH
4
RUN
ERR AX4
AX3
AX2
AX1
QD75MH4
Display Attention point Description Display Attention point Description
RUN
ERR
AX1
AX2
AX3
AX4
RUN is OFF.
Hardware failure,
watch dog timer
error
RUN
ERR
AX1
AX2
AX3
AX4
AX1 (or other
axis) illuminates.
The
corresponding
axis is in
operation.
RUN
ERR
AX1
AX2
AX3
AX4
RUN illuminates.
ERR is OFF.
The module
operates
normally.
RUN
ERR
AX1
AX2
AX3
AX4
ERR flashes.
AX1 (or other
axis) flashes.
An error occurs
on the
corresponding
axis.
RUN
ERR
AX1
AX2
AX3
AX4
ERR illuminates. System error
RUN
ERR
AX1
AX2
AX3
AX4
All LEDs
illuminate.
Hardware failure
RUN
ERR
AX1
AX2
AX3
AX4
AX1 to AX4 are
OFF.
The axes are
stopped or on
standby.
The symbols in the Display column indicate the following
statuses:
: Turns OFF. : Illuminates. : Flashes.
(3)
The interface for each QD75MH is shown below:
QD75MH1 QD75MH2 QD75MH4
QD75MH1 QD75MH2
AX1
AX2
AX1
RUN
ERR
AX2
AX1RUN
ERR
AX1
QD75MH1
QD75MH2
QD75MH4
AX1
AX2
AX3
AX4
RUN
ERR AX4
AX3
AX2
AX1
QD75MH4