Mitsubishi Electric MELSEC-Q Series - Page 106

4 - 4
Chapter 4 Installation, Wiring and Maintenance of the Product
(1) LED (upper part on the front)
QD77GF16
QD77GF8
RUN
ERR.
AX
L ERR.
D LINK
RDSD
QD77GF16
RUN
ERR.
AX
L ERR.
D LINK
RDSD
QD77GF4
RUN
ERR.
AX
L ERR.
D LINK
RDSD
QD77GF8QD77GF4
LED Display Description LED Display Description
RUN
LED is
OFF.
RUN
SD
ERR.
AX
D LINK
RD
L ERR.
Hardware failure,
watch dog timer error
SD LED
is ON.
RUN
SD
ERR.
AX
D LINK
RD
L ERR.
Sending data.
RUN
LED is
ON.
ERR.
LED is
OFF.
RUN
SD
ERR.
AX
D LINK
RD
L ERR.
Operates normally.
SD LED
is OFF.
RUN
SD
ERR.
AX
D LINK
RD
L ERR.
Data not sent
ERR.
LED is
flashing.
AX LED
is OFF.
RUN
SD
ERR.
AX
D LINK
RD
L ERR.
Token pass not
executed for some
stations
D LINK
LED is
ON.
RUN
SD
ERR.
AX
D LINK
RD
L ERR.
Data link in
operation (cyclic
transmission in
progress)
ERR.
LED is
flashing.
AX LED
is
flashing.
RUN
SD
ERR.
AX
D LINK
RD
L ERR.
Axis error
D LINK
LED is
flashing.
RUN
SD
ERR.
AX
D LINK
RD
L ERR.
Data link in
operation (cyclic
transmission
stopped)
ERR.
LED is
ON.
RUN
SD
ERR.
AX
D LINK
RD
L ERR.
System error,
CPU stop error,
error in all stations,
station number
duplication,
invalid network
parameter
D LINK
LED is
OFF.
RUN
SD
ERR.
AX
D LINK
RD
L ERR.
Data link not
performed
(disconnected)
AX LED
is ON.
RUN
SD
ERR.
AX
D LINK
RD
L ERR.
Axis operation in
progress
RD LED
is ON.
RUN
SD
ERR.
AX
D LINK
RD
L ERR.
Receiving data.
AX LED
is OFF.
RUN
SD
ERR.
AX
D LINK
RD
L ERR.
An axis stops or is on
standby.
RD LED
is OFF.
RUN
SD
ERR.
AX
D LINK
RD
L ERR.
Data not received
L ERR.
LED is
ON.
RUN
SD
ERR.
AX
D LINK
RD
L ERR.
Frame error
detection
L ERR.
LED is
OFF.
RUN
SD
ERR.
AX
D LINK
RD
L ERR.
Frame error not
detected
: ON, : Flashing, : OFF