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

List of alarm codes

If an alarm occurs during operation, the analog input module stores the alarm code into 'Latest alarm code' (Un\G2) of the
buffer memory. Turning on Error clear request (Un\G70, b15) 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. It represents one of numerical values 0 to
3, which correspond to CH1 to CH4.
(CH1: 0, CH2: 1, CH3: 2, CH4: 3)
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)
090H Input signal error detection
(upper limit)
091H Input signal error detection
(lower limit)
092H Input signal error detection
(simple disconnection)
1 FX5-4AD
106
1.10 Troubleshooting
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 (lower limit) has occurred in
CH.
An input signal error (upper limit) has been
detected in CH.
An input signal error (lower limit) has been
detected in CH.
An input signal error (simple disconnection) has
been detected in CH.
Corrective action
Adjust CH Digital operation value to fall within the
range. As a result, the corresponding bit of Warning
output flag (Process alarm upper limit) and/or
Warning output flag (Process alarm lower limit), and
Alarm output signal (Un\G69, b8) turn off
automatically.
Adjust the change rate in CH Digital output value
to fall within the range. As a result, the
corresponding bit of Warning output flag (Rate alarm
upper limit) or Warning output flag (Rate alarm lower
limit), and Alarm output signal (Un\G69, b8) turn off
automatically.
Adjust the analog input value to fall within the range,
and then turn offonoff Error clear request
(Un\G70, b15). As a result, the corresponding bit of
Input signal error detection flag and Input signal
error detection signal turn off.