Download Loop Control Module User`s Manual

8 TROUBLESHOOTING
Error code
(hexadecim
al)*1
Error type
002EH
AT error
completion
004EH
005EH
001FH
002FH
Hardware
error
003FH
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Cause
• The measured value is out of
the input range during AT.
001EH
003EH
MELSEC-Q
• Control mode switched to the
mode other than normal control
mode during AT.
The following buffer memory of
applicable channel is changed
during AT.
• Set value (SV) setting
• Upper output limiter
• Lower output limiter
• Output variable limiter
• Sensor compensation value
setting
• Primary delay digital filter
setting
• Control mode
• AT bias
The following buffer memory of
applicable channel is changed,
and the set value is out of the
range during AT.
• Upper setting limiter
• Lower setting limiter
• The half sine of data collection
wave exceeded two hours
during AT.
• PID constant calculated value
exceeded the range.
• Adjustment data error is
detected.
• Analog/Digital conversion value
error is detected.
• Temperature compensation
error is detected. (Includes the
case of cold junction
temperature compensation
resistance is not connected.)
Error-time operation
Corrective action
• AT status (Xn4, Xn5) turns
off.
• PID constants and loop
disconnection detection
judgment time do not
change.
• Remove error factors after making error
reset start command (Yn2: ON) and
execute AT again.
• It depends on hardware
error case.
• For temperature compensation error
(Error code: 003FH), make sure that
terminal block/cold junction temperature
compensation resistor is not
disconnected. If it is disconnected,
connect correctly.
• Replace the module.
• Please consult your sales representative
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