Warning Output Function - Mitsubishi Electric MELSEC-Q series User Manual

4.10

Warning Output Function

(1) Process alarm
When a digital output value enters the alert output range set in advance, an alert is output.
When the scaling function is enabled, scaling values are applied to the warning detection.
Digital output value
CH1 Warning output flag
(Process alarm upper limit value)
(Un\G50.b0)
CH1 Warning output flag
(Process alarm lower limit value)
(Un\G50.b1)
CH2 Warning output flag
(Process alarm upper limit value)
(Un\G50.b2)
Warning output signal (X8)
(a) Operation of warning output
If a digital output value enters the alert output range (process alarm upper upper limit value or more, or process
alarm lower lower limit value or less), an alert is output as follows.
• Alarm ON (1) is stored in Warning output flag (Process alarm) (Un\G50).
• Warning output signal (X8) turns on.
• The ALM LED turns on.
• Alarm code 10  is stored in Latest error code (Un\G19).
Alarm codes are stored as below.
However, the digital conversion continues on the channel where an alert was output.
Alert
Upper upper
limit value
Upper lower
limit value
CH1 digital output value
Lower upper
limit value
CH2 digital output value
Lower lower
limit value
ON
OFF
OFF
OFF
ON
OFF
10
Fixed
Process alarm channel number
0: Process alarm upper limit
1: Process alarm lower limit
Alert output range
Out of alert output range
Included
Alert
Alert cleared
Alert
OFF
ON
ON
CHAPTER 4 FUNCTIONS
Alert cleared
Alert cleared
Time
OFF
OFF
OFF
51
4