Справочник Пользователя для Mitsubishi Electronics QD75MH2

 
 

 

15 - 60 

MELSEC-Q

 

15   TROUBLESHOOTING 

 

15.4 LED display functions 

The states of QD75MH and each axis control can be confirmed by the LEDs located 
on the front panel of the QD75MH main unit. 

 

QD75MH4

RUN

ERR

AX1

AX2

AX3

AX4

 

 

Each axis can be monitored by the states of the LEDs. 
The operation and indications of the LEDs are as shown below. 

 

Details of indication 

Goes OFF   

Goes ON   

Flashes   

Points to be 

confirmed 

Error Remedy 

RUN

ERR

AX1
AX2
AX3
AX4

 

Extinguishment of 
RUN LED 

The hardware is 
faulty or watch dog 
timer error occurs. 

If the RUN LED does not light up even when the 
power is turned ON, the module may be out of order.  
Replace the module with a new one. 

RUN

ERR

AX1
AX2
AX3
AX4

 

Lighting of RUN LED, 
Extinguishment of 
ERR LED 

The module is 
normal. 

— 

RUN

ERR

AX1
AX2
AX3
AX4

 

Lighting of ERR LED  System error 

An operation condition setting error or installation PLC 
CPU type error occurs. 
(The setting and PLC CPU type are outside the 
specification range.) Set the PLC CPU type to a one 
contained in the specification. 

RUN

ERR

AX1
AX2
AX3
AX4

 

Extinguishment of 
AX1 to AX4 LEDs 

During axis stop, 
during axis standby 

— 

RUN

ERR

AX1
AX2
AX3
AX4

 

Lighting of AX1 
(Same even if the 
other axis is lit) 

During axis 
operation 

This lights up from the positioning start until the 
positioning is completed, stopped temporarily, or 
stopped by error (corresponding at a ratio of 1 : 1 to 
BUSY signals). 

RUN

ERR

AX1
AX2
AX3
AX4

 

Flashing of ERR LED 
Flashing of AX1 LED 
(Same even if the 
other axis flashes) 

Axis error 

Check the error observed on the buffer memory batch 
processing monitor of a peripheral device and correct 
the applicable parameters and positioning data. 

RUN

ERR

AX1
AX2
AX3
AX4

 

Lighting of all LEDs 

The hardware is 
faulty 

The module comes out of order.  Replace the module 
with a new one.