Alarm Code List - Mitsubishi Electric MELSEC-Q series User Manual

11.2

Alarm Code List

This section describes alarm codes that occur in a CT input module.
(1) Alarm code checking method
Alarms occurred in the CT input module can be checked by the same methods as those for errors. (
221, Section 11.1 (1))
(2) Alarm code list
The following table lists alarm codes.
Alarm code
(decimal)
A process alarm or a rate alarm is occurring.
The channel where a process alarm or rate alarm has occurred
fits in .
A value fits in
10 
0: Process alarm upper limit
1: Process alarm lower limit
2: Rate alarm upper limit
3: Rate alarm lower limit
An input signal error is occurring.
110
The channel where an input signal error has occurred fits in .
A peak current was detected.
120
The channel where the peak current has been detected fits in .
228
Description and the alarm cause
indicates that the alarm status is as follows:
Action
When the digital output value returns to the one
within the setting range, the following turns off.
• The corresponding bit of Warning output flag
(Process alarm) (Un\G50)
• The corresponding bit of Warning output flag
(Rate alarm) (Un\G51)
• Warning output signal (X8)
The alarm code can be cleared by turning off, on,
and off Error clear request (YF) after the digital
output value returns to the one within the setting
range.
The corresponding bit of Input signal error
detection flag (Un\G49) and Input signal error
detection signal (XC) turn off by turning off, on,
and off Error clear request (YF) after the CT input
value returns to the one within the setting range.
The corresponding bit of Peak current detection
flag (Un\G301) and Peak current detection signal
(X7) turn off by turning off, on, and off Error clear
request (YF) after the CT input value returns to
the one within the setting range.
Page