Mitsubishi Electric MELSEC iQ-R Series User Manual page 79

Alert with wait
Even though the temperature process value (PV) or deviation (E) has been in an alert status when the mode is shifted from
the setting mode to the operation mode ('Setting/operation mode command' (Y1) is turned from OFF to ON), this condition is
ignored and no alert occurs. The alert function can be disabled until the temperature process value (PV) or deviation (E) goes
out of the condition in which an alert occurs.
Ex.
When the alert mode has been set to "Lower Limit Deviation Alert with Wait"
Lower limit deviation alert
Deviation (E)
(= Temperature process value (PV) - set value (SV)
0
Alert set value
Alert status
Non-alert status
*1 Depending on the set alert mode, this value becomes the set value or the monitored value. ( Page 73 Setting the set value (SV) and
the setting variation rate limiter)
When the system goes into the non-alert status even once after an alert judgment has started following the set
alert mode, an alert with wait is disabled even though the mode is shifted to the one with standby.
■Setting method
Select one of the following alert modes: ( Page 79 Alert mode)
Alert mode setting
Setting value Alert mode name
7 Upper limit input alert with wait
8 Lower limit input alert with wait
9 Upper limit deviation alert with wait
10 Lower limit deviation alert with wait
11 Upper/lower limit deviation alert with wait
19 Upper limit deviation alert with wait (use set value (SV) setting value)
20 Lower limit deviation alert with wait (use set value (SV) setting value)
21 Upper/lower limit deviation alert with wait (use set value (SV) setting value)
Lower limit deviation alert with wait
Deviation (E)
*1 (= Temperature process value (PV) - set value (SV)
)
Time
Alert set value
Alert status
Alert status
0
Wait operation
region
Non-alert status Alert status
1 FUNCTIONS
1.25 Alert Function
1
*1
)
Time
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