Mitsubishi Electric MELSEC-Q series User Manual page 83

(5) Warning output signal (X8)
Warning output signal (X8) turns on when the process alarm or rate alarm has been detected.
The process alarm and rate alarm can be detected only when the warning output function is enabled.
For details on the warning output function, refer to the following.
• Warning Output Function (
(a) Process alarm
• Warning output signal (X8) turns on when a digital output value exceeds the set range for CH1 Process
alarm lower lower limit value (Un\G86) to CH8 Process alarm upper upper limit value (Un\G117). The ALM
LED also turns on along with the on of the signal.
• Warning output signal (X8) turns off when the digital output value falls within the setting range for all the
digital conversion enabled channels. The ALM LED also turns off.
(b) Rate alarm
• Warning output signal (X8) turns on when a digital output value exceeds the change rate of CH1 Rate
alarm upper limit value (Un\G126) to CH8 Rate alarm lower limit value (Un\G141). The ALM LED also
turns on.
• Warning output function turns off when the change of the digital output value falls within the setting range
for all the digital conversion enabled channels. The ALM LED also turns off.
Warning output flag
(Process alarm) (Un\G50)
Warning output flag
(Rate alarm) (Un\G51)
Warning output
signal (X8)
CHAPTER 5 I/O SIGNALS ASSIGNED TO THE CPU MODULE
Page 51, Section 4.10)
Controlled by the CT input module
1 (Alert (process alarm or
0 (Normal)
rate alarm))
ON
OFF
0 (Normal)
OFF
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