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6. TROUBLESHOOTING
6.2
When Wire Breakage Detection Flag is On
Connection between platinum temperature-
measuring resistor and cable is incomplete.
Terminal screw is loose.
The connected platinum temperature-measuring
resistor or cable has wire breakage.
The channel to which platinum temperature-
measuring resistor is not connected is
designated as conversion enabled.
2
6.3
When E
PROM Error Flag is On
Error in the internal memory storing the offset
value/gain value set by user
6.4
When Detected Temperature Value cannot be Read
The channel used is designated as conversion
disabled.
Programmable controller CPU or master module
error
6.5
When Detected Temperature Value is Abnormal
The platinum temperature-measuring resistor
connected is different from what is designated.
Affected by noise.
Cause
Securely connect the platinum temperature-measuring resistor
and cable.
Tighten the terminal screws within the specified torque range.
Check the continuity of platinum temperature-measuring
resistor and cable, and replace the broken platinum
temperature-measuring resistor or cable.
Confirm the channels for which the conversion enable is
designated and channel to which platinum temperature-
measuring resistor is connected, then correct the conversion
enable designation.
Cause
Restart power for AJ65BT-64RD. *1
If the E
the nearest representative or branch regarding the problem, as
hardware may be faulty.
*1 Restart power : Turn on the power supply again, or turn on the reset switch.
Cause
Designate the channel as conversion enable in sequence
program.
Confirm the programmable controller CPU and master module.
Cause
Designate the platinum temperature-measuring resistor
connected.
Confirm the influence from grounding and adjacent devices,
then take measures against noise.
6-3
Corrective action
Corrective action
2
PROM error flag is still on after power restart, contact
Corrective action
Corrective action
MELSEC-A
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