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CHAPTER 4 FUNCTIONS
4
4.12 Alert Function
(c) Lower limit deviation alert
When the deviation (E) is equal to or less than the alert set value, the system is put in an alert status.
*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))
(d) Upper lower limit deviation alert
When one of the following conditions is satisfied, the system is put in an alert status.
• Deviation (E) Alert set value
• Deviation (E) -(Alert set value)
*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 alert set value is positive When the alert set value is negative
Non-alert status Alert status
Time
Deviation (E)
(= Temperature process value (PV) - set value (SV)
*1
)
Alert status
0
Alert set value
Time
Temperature process value (PV)
Set value
(SV)
*1
Non-alert status Alert status
Time
Deviation (E)
(= Temperature process value (PV) - set value (SV)
*1
)
Alert status
0
Alert set value
Time
Temperature process value (PV)
Set value
(SV)
*1
Non-alert status Alert status
Time
Deviation (E) (= Temperature process value (PV) - set value (SV)
*1
)
Alert status
0
- (Alert set value)
Alert set value
Time
Temperature process value (PV)
Set value (SV)
*1