Using The Led Indications To Check Errors - Mitsubishi Electric AJ65VBTCU-68DAVN User Manual

6 TROUBLESHOOTING

6.2 Using the LED Indications to Check Errors

This section explains how to check errors using the LED indications of the
AJ65VBTCU-68DAVN.
Refer to the programmable controller CPU and master module user's manual for
issues regarding the programmable controller CPU and master module.
(1) When the AJ65VBTCU-68DAVN "POWER" LED is off
Is 24VDC power on?
Is the voltage of the 24VDC power supply within the
specified value?
(2) When the AJ65VBTCU-68DAVN "RUN" LED flickers
Is the LED flickering at
0.1s intervals in the
normal mode?
Is the LED flickering at 0.5s intervals in the normal
mode?
Is the LED flickering at 0.1s intervals in the test
mode?
Is the LED flickering at 0.5s intervals in the test
mode?
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Check Item
Check item
When used as the ver.
1 remote device station
(ver. 1 compatible slave
station)
When used as the ver.
2 remote device station
(ver. 2 compatible slave
station)
MELSEC-A
Corrective Action
Check the external power supply.
Set the voltage value to within the range 20.4 to
26.4V.
Corrective action
1. Check that the mode select switch is not set to
other than 0. (When the module is used as the
ver. 1 remote device station, set the mode select
switch to "0".)
2. Check the error code (RWrn+8) to confirm the
channel where the output range setting error
occurred.
3. Correct the sequence program or GX Developer
setting.
1. Check that the mode select switch is not set to
other than 3. (When the module is used as the
ver. 2 remote device station, set the mode select
switch to "3".)
2. Check the error code (RWrn+8) to confirm the
channel where the output range setting error
occurred.
3. Correct the sequence program or GX Developer
setting.
1. Check that the mode select switch has not been
moved from the position at power-on. (When the
switch is returned to the original setting, the
flickering LED is lit.)
2. Using the error code (RWrn+8), check the
channel at which the digital value setting error
has occurred.
3. Check the check code (RWrn to RWrn+7) of the
channel at which the error has occurred.
4. Make correction to the sequence program.
Check that the mode select switch is not outside the
setting range.
Change the offset/gain adjustment to within the
available setting range.
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