Run Indicator Lamp (Statuses: On, Off) [Fx3G/Fx3U/Fx3Uc; Batt Indicator Lamp (Statuses: On, Off) [Fx3U/Fx3Uc; Alm Indicator Lamp (Statuses: On, Off) [Fx3G; Error Indicator Lamp (Statuses: On, Flashing, Off) [Fx3G/Fx3U/Fx3Uc - Mitsubishi FX3G Series User Manual

FX /FX /FX PLC User's Manual - Positioning Control Edition
3G 3U 3UC
Built-in Positioning Functions
13.1.2 RUN Indicator Lamp (Statuses: ON, OFF) [FX
Lamp
status
The sequence program is being
ON
executed.
Execution of the sequence program is
OFF
stopped.
13.1.3 BATT Indicator Lamp (Statuses: ON, OFF) [FX
Lamp
status
ON The voltage of the battery is too low.
The battery supplies enough voltage as
OFF
specified by D8006.
13.1.4 ALM Indicator Lamp (Statuses: ON, OFF) [FX
This LED is valid when the optional battery is installed and the battery mode is selected using a parameter.
Lamp
status
ON The voltage of the battery is too low.
The battery supplies enough voltage as
OFF
specified by D8006.
13.1.5 ERROR indicator lamp (Statuses: ON, flashing, OFF) [FX
Lamp
status
A watchdog timer error may have
ON been detected, or the hardware of the
PLC may be damaged.
Status of PLC
The RUN indicator lamp indicates the operation status of the PLC.
Note that the RUN indicator lamp will go out depending on the status
of the ERROR indicator lamp (refer to Subsection 13.1.4).
Status of PLC
Immediately replace the battery (refer to the manual of the PLC).
The PLC has no problems.
Status of PLC
Immediately replace the battery (refer to the manual of the PLC).
The PLC has no problems.
Status of PLC
1) Stop the PLC, and then turn the power ON again. If the
2) Remove the PLC, and put it on a workbench. Supply another
3) If measures 1) and 2) do not turn the ERROR indicator lamp
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3G 3U 3UC
Troubleshooting
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3U 3UC
Troubleshooting
]
3G
Troubleshooting
/FX
3G
Troubleshooting
ERROR (ERR) indicator lamp goes out, check to see if a
watchdog timer error has been detected, and take one of the
following measures.
- Review the program.
The maximum value of the scanning time (D8012) should
not be larger than the set value of the watchdog timer
(D8000).
- The interrupt input and the pulse catch input should not be
turned on and off too frequently during 1 scan time.
- The frequency of the pulse input to the high-speed counter
should not exceed the specified range (duty:50%)
- Add several WDT instructions.
Set several WDT instructions in the program so that the
watchdog timer can be reset several times during 1 scan
time.
- Change the set value of the watchdog timer.
Using the program, change the set value of the watchdog
timer (D8000) so that the set value of the watchdog timer
(D8000) can be larger than the maximum value of the
scanning time (D8012).
source of power to the PLC.
If the ERROR (ERR) indicator lamp does not light, the cause
of the problem may be noise. In this case, take the following
measures.
- Check the grounding line, and change the wiring route and
the installation place.
- Adopt a noise filter for the power supply line.
OFF, please contact the nearest Mitsubishi Electric distributor
office.
13 Troubleshooting
13.1 LED Indicator Lamp Check
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3U 3UC
B - 169
A
B
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