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(3) Alert with standby
Even if the temperature process value (PV) or deviation (E) is in a condition to be in an alert status when the
module's status is changed from the setting mode to the operation mode (Setting/operation mode instruction
(Yn1): OFFON), the alert does not occur. The alert function can be disabled until the temperature process
value (PV) or deviation (E) strays out of the condition to be in an alert status.
Ex.
When the alert mode is set to Lower limit deviation alert with standby (10)
The alert function is inactive until the deviation (E) exceeds the alert set value (right figure below).
*1 Depending on the alert mode, this value becomes "set value (SV) monitor" or "set value (SV) setting". ( Page 195,
Section 4.12 (2) (a))
When the system goes into the non-alert status even once after an alert judgment started following the setting of the alert
mode, the alert with standby will be inactive even if the mode is changed to the one with standby.
(a) Setting method
Select one of the following alert modes.
Lower limit deviation alert ( Page 197, Section
4.12 (2) (c))
Lower limit deviation alert with standby
Alert mode setting ( Page 204, Section 4.12 (7) (a))
Setting value Alert mode name
7 Upper limit input alert with standby
8 Lower limit input alert with standby
9 Upper limit deviation alert with standby
10 Lower limit deviation alert with standby
11 Upper lower limit deviation alert with standby
19 Upper limit deviation alert with standby (using the set value (SV))
20 Lower limit deviation alert with standby (using the set value (SV))
21 Upper lower limit deviation alert with standby (using the set value (SV))
0
Non-alert status Alert status
Tim
e
Alert status
Alert set value
Deviation (E)
(= Temperature process value (PV) - set value (SV)
*1
)
Non-alert status Alert status
Time
Alert status
Alert set value
Deviation (E)
(= Temperature process value (PV) - set value (SV)
*1
)
0
Wait operation
region