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6 TROUBLESHOOTING
6.2 Using the LED Indications to Check Errors
6
6 - 2
This section explains how to check errors using the LED indications of the
AJ65VBTCU-68ADVN/ADIN.
Refer to the PLC CPU and master module user's manual for issues regarding the PLC
CPU and master module.
(1) When the AJ65VBTCU-68ADVN/ADIN "POWER" LED is off
Check item
Is 24VDC power on?
Is the voltage of the 24VDC power supply within the
specified value?
(2) When the AJ65VBTCU-68ADVN/ADIN "RUN" LED is flashing
Check item
When used as the ver. 1
remote device station (ver.
1 compatible slave station)
Is the LED flickering
at 0.1s intervals in
the normal mode?
When used as the ver. 2
remote device station (ver.
2 compatible slave station)
Is the LED flickering at 0.5s intervals in the mormal
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?
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 input 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 input 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. Check the error code (RWrn+8) to confirm the
channel where the average number of times
setting or average time setting error occurred.
3. Correct the sequence program or GX Developer
setting.
Check that the mode select switch is not outside the
setting range.
Change the offset/gain adjustment to within the
available setting range.
6 - 2
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