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21 MAINTENANCE AND INSPECTION
21.4 Backlight Shutoff Detection
21.4
Backlight Shutoff Detection
A GOT has a built-in backlight for the liquid crystal display.
When a GOT detects the backlight shutoff, the POWER LED alternately flashes with orange/green color.
The brightness of the backlight degrades as the usage period passes. Replace the backlight when it is shut off or the display
gets blurry.
For the replacement of the backlight, contact your local distributor.
Backlight life
The usage period of the backlight can be extended by setting [Screen saving backlight off] in the GOT utility function (GOT
setup). For details, refer to the following.
Page 105 DISPLAY AND OPERATION SETTINGS (GOT SET UP)
Backlight shutoff detection and external alarm
When the GOT has detected that the backlight is shut off, the system information set by using drawing software is turned on.
The information of the backlight shutoff can be output from a PLC to an external device (such as lamp and buzzer) by using
the system information.
An alarm for prevention of touch operation should be set and the external interlock should also be set for the dangerous load.
For system information details, refer the following.
GT Designer3 (GOT2000) Screen Design Manual
• Example of alarm for external devices (such as lamp and buzzer)
System information is used to output the backlight shutoff detection signal from a FX series PLC to an external
device.
Condition: The write device is D20 and all data is used (the [Select All] button on the setting screen of drawing
software is clicked) for the system information assignment.
D36 b14: Backlight shutoff detection (System number 2-2)
This signal turns on when the backlight shutoff is detected.
This signal is used in a sequence programs shown below.
• Caution when the backlight is shut off
Even when the backlight is shut off, the touch keys are available.
Replace the dead backlight as soon as possible.
M34
Output to external device of PLC
Activated the output upon backlight
shutoff detection.
Backlight shutoff detection
M8000
MOV D36 K4M20
RUN monitor
Y***
*indicates the output number at which the external device is connected.
Summary of Contents for GOT SIMPLE Series
Page 1: ...GOT SIMPLE Series User s Manual GS21 model ...
Page 2: ......
Page 20: ...18 MEMO ...
Page 24: ...22 1 OVERVIEW 1 1 Features MEMO ...
Page 34: ...32 3 SPECIFICATIONS 3 4 GOT Connector Specifications MEMO ...
Page 40: ...38 4 PART NAME 4 3 Bottom MEMO ...
Page 62: ...60 7 WIRING 7 2 Wiring Inside and Outside the Panel MEMO ...
Page 76: ...74 10 LANGUAGE SETTING LANGUAGE 10 1 Display language setting MEMO ...
Page 130: ...128 12 DISPLAY AND OPERATION SETTINGS GOT SET UP 12 7 IP Filter Setting MEMO ...
Page 160: ...158 14 CLOCK SETTINGS TIME SETTING AND DISPLAY 14 1 Time Setting and Display MEMO ...
Page 268: ...266 16 GOT SELF CHECK DEBUG 16 3 FX3U ENET ADP Communication Setting Function MEMO ...
Page 274: ...272 17 MAINTENANCE 17 3 Clean MEMO ...
Page 280: ...278 20 ERROR MESSAGE LIST MEMO ...
Page 296: ...294 22 TROUBLESHOOTING 22 1 GOT Restoration Sheets MEMO ...
Page 298: ...296 23 CONNECTION MEMO ...
Page 305: ...24 APPENDIX 24 1 External Dimensions 303 24 MEMO ...
Page 309: ......