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

3.5

List of Alarm Codes

If an alarm occurs during operation, a temperature input module stores the alarm code into 'Latest alarm code' (Un\G2) of the
buffer memory. Turning on Error clear request (YF) clears the alarm code in 'Latest alarm code' (Un\G2).
The following table lists the alarm codes that may be stored.
: This symbol indicates the number of the channel where an alarm has occurred. A numerical value of 0 to 7 is used to
correspond to CH1 to 8.
(CH1: 0, CH2: 1, CH3: 2, CH4: 3, CH5: 4, CH6: 5, CH7: 6, CH8: 7)
Alarm code Alarm name
080H Process alarm (upper limit)
081H Process alarm (lower limit)
082H Rate alarm (upper limit)
083H Rate alarm (lower limit)
0A0H Disconnection detection
Description and cause
The process alarm (upper limit) has occurred in
CH.
The process alarm (lower limit) has occurred in
CH.
The rate alarm (upper limit) has occurred in
CH.
The rate alarm (upper limit) has occurred in
CH.
Disconnection has been detected in CH.
Action
Adjust CH Measured temperature value to fall
within the range. As a result, the corresponding bit of
CH Alert output flag (Process alarm upper limit)
and/or CH Alert output flag (Process alarm lower
limit), and Alert output signal (XD) turn off
automatically.
Adjust the change in CH Measured temperature
value to fall within the range. As a result, the
corresponding bit of CH Alert output flag (Rate
alarm upper limit) or CH Alert output flag (Rate
alarm lower limit), and Alert output signal (XD) turn
off automatically.
Re-establish the connection and turn on and off
Error clear request (YF). As a result, the
corresponding bit of Disconnection detection flag,
and Disconnection detection signal (XC) turn off, and
the alarm code of Latest alarm code is cleared.
3 TROUBLESHOOTING
3.5 List of Alarm Codes
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