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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 QD75 and axes.
QD75P4
RUN
ERR
AX1
AX2
AX3
AX4
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 of each QD75 is as shown below.
QD75D1
RUN
ERR
AX1
AX1
QD75D2
RUN
ERR
AX1
AX1
QD75D4
RUN
ERR
AX1
AX1
AX2
AX2
AX2
AX3
AX4
AX2
AX3
AX4
QD75P1
RUN
ERR
AX1
AX1
QD75P2
RUN
ERR
AX1
AX1
QD75P4
RUN
ERR
AX1
AX1
AX2
AX2
AX2
AX3
AX4
AX2
AX3
AX4
QD75P1
QD75P2 QD75P4 QD75D1 QD75D2 QD75D4