Mitsubishi Electric MELSEC-Q series User Manual page 113

(13)Warning output flag (Process alarm) (Un\G50), Warning output flag (Rate
alarm) (Un\G51)
The process alarm and rate alarm can be checked whether the alarm is the upper limit alarm or lower limit alarm
for each channel.
For details on the warning output function, refer to the following.
• Warning Output Function (
b15 b14
Warning output flag
(Process alarm)
(Un\G50)
Warning output flag
(Rate alarm)
(Un\G51)
(a) Status of Warning output flag (Process alarm) (Un\G50) and Warning output flag
(Rate alarm) (Un\G51)
When an alarm is detected due to any of the following, Alarm ON (1) is stored in Warning output flag
corresponding to each channel.
• The digital output value exceeds the setting range of CH1 Process alarm lower lower limit value (Un\G86)
to CH8 Process alarm upper upper limit value (Un\G117).
• The 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).
When an error is detected in any channels in which the digital conversion or input signal error detection is
enabled, Warning output signal (X8) turns on.
(b) Clearing Warning output flag (Process alarm) (Un\G50) and Warning output flag
(Rate alarm) (Un\G51)
The alarms are cleared by any of the following.
• The digital output value or the change rate of the digital output value returns within the setting range.
• Turn on then off Operating condition setting request (Y9)
Page 51, Section 4.10)
b13 b12 b11 b10 b9
CHAPTER 6 BUFFER MEMORY
b8 b7 b6 b5 b4 b3 b2 b1 b0
0: Normal
1: Alarm ON
111
6