List Of Alarm Codes - Mitsubishi Electric MELSEC iQ-R Series User Manual

3.5

List of Alarm Codes

If an alarm occurs in operation of the temperature control module, the alarm code of the alarm is stored into 'Latest alarm
code' (Un\G3) of the buffer memory. Turning ON and OFF 'Error reset command' (Y2) clears the alarm code in 'Latest alarm
code' (Un\G3).
 in alarm codes: This symbol indicates the number of the channel where an alarm has occurred. (1: CH1, 2: CH2, 3: CH3, 4:
CH4)
Alarm code Alarm name
080H CH Process value (PV) out of
input range (upper limit)
081H CH Process value (PV) out of
input range (lower limit)
082H CH Rate alarm (upper limit)
083H CH Rate alarm (lower limit)
084H CH Alert 1
085H CH Alert 2
086H CH Alert 3
087H CH Alert 4
088H CH Heater disconnection
detection
089H CH Loop disconnection
detection
08AH CH Output off-time current error
detection
Description and cause
The temperature process value (PV)
has exceeded the temperature
measuring range that was set as the
input range.
The temperature process value (PV)
is below the temperature measuring
range that was set as the input range.
A rate alarm (upper limit) has
occurred.
A rate alarm (lower limit) has
occurred.
Alert 1 has occurred.
Alert 2 has occurred.
Alert 3 has occurred.
Alert 4 has occurred.
A heater disconnection has been
detected.
A loop disconnection has been
detected.
An output off-time current error has
been detected.
Action
After the temperature process value (PV) falls within the
setting range, turn ON and OFF 'Error reset command'
(Y2) to clear the alarm code stored in 'Latest alarm code'
(Un\G3).
After the temperature process value (PV) falls within the
setting range, the corresponding bit of Alert definition and
'CH Alert flag' (XC to XF) automatically turn OFF.
After the temperature process value (PV) is restored from
the alert status, turn ON and OFF 'Error reset command'
(Y2) to clear the alarm code stored in 'Latest alarm code'
(Un\G3).
After the temperature process value (PV) is restored from
the alert status, the corresponding bit of Alert definition
and 'CH Alert flag' (XC to XF) automatically turn OFF.
After the temperature process value (PV) is restored from
the alert status, turn ON and OFF 'Error reset command'
(Y2) to clear the alarm code stored in 'Latest alarm code'
(Un\G3).
After the temperature process value (PV) is restored from
the alert status, the corresponding bit of Alert definition
and 'CH Alert flag' (XC to XF) automatically turn OFF.
After the detected disconnection or the detected output
off-time current error is resolved, turn ON and OFF 'Error
reset command' (Y2) to clear the alarm code stored in
'Latest alarm code' (Un\G3).
After the detected disconnection or the detected output
off-time current error is resolved, the corresponding bit of
Alert definition and 'CH Alert flag' (XC to XF)
automatically turn OFF.
3 TROUBLESHOOTING
3.5 List of Alarm Codes
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