MITSUBISHI ELECTRIC F940GOT-SWD-E - Manual (Page 95)

Troubleshooting 6.
6-1
6. Troubleshooting
This section describes troubleshooting during operation.
6.1 Power indication
When an abnormality has occurred, check the following points.
The POWER LED in the GOT is lit by the 5 V power supply inside the GOT. When the POWER
LED is extinguished, nothing is displayed on the screen or no key is accepted, the power sup-
ply may be insufficient.
Especially when the power is supplied from the FX Series PLC, the following points are sus-
pected.
1) Much sensor current is used.
2) Many extension blocks are used.
Disconnect all equipment except the GOT from the +24 terminal in the FX Series PLC, and
check whether the GOT operates normally.
When the display screen is dark, adjust "LCD CONTRAST" on the SET-UP MODE screen.
When the screen is still dark, it is recommended to replace the backlight (F9GT-40LTS).
F940GOT-SWD-E/LWD-E