Troubleshooting
8-2
8.1 Self-diagnostic Function
8.1.1 Operation Monitor LEDs of Control Unit
•
The control unit has a self-diagnostic function which identifies errors and stops operation if
necessary.
•
When an error occurs, the status of the status indicator LEDs on the control unit vary, as
shown in the table above.
LEDs related to self-diagnostic errors
LED display
Description
Operation
status
RUN
(Green)
PROG
(Green)
ERR/ALM
(Red)
In normal
condition
ON
OFF
OFF
Normal operation
Operating
OFF
ON
OFF
Program mode
LED does not flash even if the forcing
output is performed in program mode.
Stop
Flashes
(Note 1)
Flashes
(Note 1)
OFF
Forcing input/output in RUN mode
RUN and PROG. LEDs flash
alternately.
Operating
Flashes
(Note 2)
Flashes
(Note 2)
OFF
During version upgrade
Stop
In
abnormal
condition
ON
OFF
Flashes
Self-diagnostic error (During operation)
Operating
OFF
ON
Flashes
Self-diagnostic error (During stop)
Stop
OFF
ON
ON
System watchdog timer has been
activated
Stop
(Note 1): The flashing is repeated every 1 second. (ON for 0.5 seconds
⇔
OFF for 0.5 seconds)
(Note 2): The LEDs flash quickly while upgrading the version. The flashing changes to a slow flashing while rewriting
the version.
Summary of Contents for FP0H Series
Page 1: ......
Page 11: ...1 Functions of Unit and Restrictions on Combination ...
Page 19: ...2 Wiring ...
Page 23: ...3 Power ON and OFF and Items to Check ...
Page 30: ...Power ON and OFF and Items to Check 3 8 ...
Page 31: ...4 Settings of Control Unit ...
Page 52: ...Settings of Control Unit 4 22 ...
Page 53: ...5 Operation Patterns ...
Page 89: ...6 Operating Characteristics ...
Page 93: ...7 Instruction References ...
Page 124: ...Instruction References 7 32 ...
Page 125: ...8 Troubleshooting ...
Page 133: ...9 PWM Output Function ...
Page 140: ...PWM Output Function 9 8 ...
Page 141: ...10 High speed Counter Function ...
Page 151: ...10 3 High speed Counter Instruction 10 11 MEMO ...
Page 170: ......
Page 171: ...11 FPΣ Mode ...
Page 180: ...FP Mode 11 10 ...
Page 181: ...12 Specifications ...
Page 196: ...Specifications 12 16 ...
Page 198: ......
Page 199: ......
Page 200: ......