Alert Function - Mitsubishi Electric MELSEC-Q Series User Manual

3 SPECIFICATIONS

3.2.10 Alert function

1) Upper limit input alert
When the measured value (PV) is equal to or greater
than the alert set value, the system is put in alert
status. The setting range is the same as the input
range.
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(1) The alert function sets the system in an alert status when the measured value
(PV) or deviation reaches the alert set value. It is used to turn on the device's
hazard signal or operate the safety device.
The alert function is classified as follows:
• Input alerts ............. Upper limit input alert, lower limit input alert
• Deviation alerts ...... Upper limit deviation alert, lower limit deviation alert,
If an alert occurs during the control, the Q62HLC continues its operation. Output
doesn't turn off.
(a) Input alerts
(b) Deviation alerts
1) Upper limit deviation alert
When the deviation [measured value (PV) - set value (SV)] is equal to or
greater than the alert set value, the system is put in alert status.
The setting range is full-scale.
upper/lower limit deviation alert, within-range alert
2) Lower limit input alert
When the measured value (PV) is equal to or
smaller than the alert set value, the system is put
in alert status. The setting range is the same as
the input range.
MELSEC-Q
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