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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
operating status is changed from run to stop, 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.
When the alert mode is set to "10: Lower limit deviation alert with wait"
Ex.
The alert function is inactive until the deviation (E) exceeds the alert set value. (right figure below)
Lower limit deviation alert (Page 171, Section 8.3.11 (2) (c))
Deviation (E)
(= Temperature process value (PV) - Set value (SV)
0
Alert set value
Alert status
Non-alert status
*1
Depending on the alert mode, this value becomes "set value (SV) monitor" or "set value (SV) setting". (Page 170,
Section 8.3.11 (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.
Setting value
7
8
9
10
11
19
20
21
174
*1
)
Time
Alert status
Alert mode setting (Page 176, Section 8.3.11 (6) (a))
Upper limit input alert with standby
Lower limit input alert with standby
Upper limit deviation alert with standby
Lower limit deviation alert with standby
Upper lower limit deviation alert with standby
Upper limit deviation alert with standby (using the set value (SV))
Lower limit deviation alert with standby (using the set value (SV))
Upper lower limit deviation alert with standby (using the set value (SV))
Lower limit deviation alert with standby
Deviation (E)
(= Temperature process value (PV) - Set value (SV)
0
Alert set value
Wait operation
region
Alert status
Non-alert status
Alert mode name
*1
)
Time
Alert status
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Troubleshooting
