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List Of Alarm Codes - Mitsubishi Electric MELSEC iQ-F FX5 User Manual

Temperature control.
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Error code
Error name
(HEX)
1AF9H
Backup errors
1F08H
24 V DC external
power supply error
3001H
Hardware failure
*1 The address of buffer memory area where a value out of the setting range is set can be checked with 'Error occurrence address'
(Un\G1).
*2 If "Setting change rate limiter setting" is not 0, the time monitoring starts when Set value (SV) monitor becomes equal to the AT point.
9.4

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 OFF→ON→OFF 'Error reset command' (Un\G399, b2) clears the alarm code in
'Latest alarm code' (Un\G3).
Alarm code : This symbol describes the number of the channel where an alarm has occurred. (1: CH1, 2: CH2, 3: CH3, 4:
CH4)
Alarm code
Alarm name
(HEX)
080H
CH Process value (PV) out of input
range (upper limit)
081H
CH Process value (PV) out of input
range (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
9 TROUBLESHOOTING
94
9.4 List of Alarm Codes
Cause and description
A read/write error to non-volatile memory occurred, or the
buffer memory arrange moment mode (normal mode, FX3
assignment mode) was changed.
24 V DC external power supply is not normally supplied to
the temperature control module.
A hardware failure has occurred in the temperature
control module.
Cause and description
The temperature process value (PV)
has exceeded the temperature
measuring range that was set as the
input range.
The temperature process value (PV)
has fallen below the temperature
measuring range that was set as the
input range.
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
■If the error occurs when the power supply is turned ON
(i.e., when reading from non-volatile memory)
Turn OFF→ON the power supply. If the same error
display occurs again, turn OFF→ON→OFF 'Set value
backup command' (Un\G399, b8).
■If the error occurs during backup using set value backup
commands, or when the buffer memory arrangement
mode (normal mode, FX3 assignment mode) is changed
Turn OFF→ON→OFF 'Setting value backup command'
(Un\G399, b8). If the same error occurs again, the
possible cause is a module failure. Consult your local
Mitsubishi representative, dealer, or branch office to
explain the failure symptoms.
Check the cable wiring and supplied voltage.
After checking, turn OFF→ON→OFF 'Error reset
command' (Un\G399, b2).
If the same error occurs again, the possible cause is a
module failure. Consult your local Mitsubishi
representative, dealer, or branch office to explain the
failure symptoms.
• Turn OFF→ON the power supply.
If the same error occurs again again, the possible cause
is a temperature control module failure. Consult your local
Mitsubishi representative, dealer, or branch office to
explain the failure symptoms.
Action
After the temperature process value (PV) falls within
the setting range, turn OFF→ON→OFF 'Error reset
command' (Un\G399, b2) 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 the
warning occurrence contents and 'CH Alert flag'
(Un\G398, b12 to 15) automatically turn OFF.
After the temperature process value (PV) is restored
from the alert status, turn OFF→ON→OFF 'Error
reset command' (Un\G3) 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 the
warning occurrence and 'CH Alert flag' (Un\G398,
b12 to 15) automatically turn OFF.
After the detected disconnection or the detected
output off-time current error is resolved, turn
OFF→ON→OFF 'Error reset command' (Un\G399,
b2) 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 the warning occurrence and
'CH Alert flag' (Un\G398, b12 to 15) automatically
turn OFF.

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