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6. TROUBLESHOOTING
6.
TROUBLESHOOTING
6.1
Error Code List
6.2
Troubleshooting
6
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The details of the errors which may occur when using the AJ65BT-64DAV/DAI and troubleshooting are
described.
When the data is written from the programmable controller CPU to the master module, and an error
occurs (AJ65BT-64DAV/DAI RUN LED flashes), the error code is stored to the AJ65BT-64DAV/DAI
remote register RWrn+4.
Refer to Section 3.6.5 for the error code.
A simple troubleshooting method for using the AJ65BT-64DAV/DAI is described.
Refer to the programmable controller CPU and Master Module User's Manuals regarding problems
related to the programmable controller CPU and master module.
(a) When the AJ65BT-64DAV/DAI RUN LED is flashing
Check item
There in an error in the write data.
Is there a short between the TEST terminals (test
mode)?
Is it flashing in 0.1s intervals (fast-speed) in test
mode?
(b) When the AJ65BT-64DAV/DAI RUN LED is off
Check item
Is the 24VDC power on?
Is the 24VDC power voltage at the regulated value?
Is there a short between the TEST terminals(test
mode)?
(c) When the AJ65BT-64DAV/DAI LINK RUN LED turns off
Refer to the master module troubleshooting section.
(d) When the AJ65BT-64DAV/DAI LINK ERR LED is flashing
Check item
<Flashing at regular intervals>
Was the station number or baud rate switch setting
changed during normal operation?
<Flashing at irregular intervals>
• You forgot fitting the termination resistors.
• The module or CC-Link dedicated cable is affected
by noise.
(e) When the AJ65BT-64DAV/DAI LINK ERR LED is on
Check item
Is the station number of baud rate setting correct?
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Check the cause of the error using the error code,
and correct the sequence program.
Release between the TEST terminals after adjusting
the offset/gain.
Change the offset/gain adjustment to within the
allowable range.
Check the power. (External power supply)
Set the voltage within the range 18 to 30V.
Release the TEST terminal after adjusting the
offset/gain.
Return to the station number or baud rate used
during normal operation.
Check whether the termination resistors are fitted or
not. If not, connect them and switch power on again.
• Earth both ends of the shield wire of the CC-Link
dedicated cable to the protective earth conductors
via SLD and FG of the corresponding module.
• Securely earth the FG terminal of the module to
the protective earth conductor.
• Securely earth the piping when running the wiring
inside piping.
Set a correct station number or baud rate.
6-1
MELSEC-A
Corrective action
Corrective action
Corrective action
Corrective action
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