Chapter 5. FUNCTIONS
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PV deviation rate event
PV deviation is measured in each sampling cycle set using event configuration while
on/off states are determined by comparing event setting deviation rate PVs. PV devia-
tion between sampling cycles is ignored. Event on/off switching is performed according
to the sampling cycle. This function can be combined with event on delay.
Set event value is less than 0 (using lower limit event)
Sampling cycle
ON (down alarm)
OFF
ON
OFF
ON
Time
Set event value
Set event value
Set event value
PV
PV deviation rate
upper limit event
operation
PV deviation rate
lower limit event
operation
(1)
(2)
(3)
(4)
Sampling
Set event value is more than 0 (using upper limit event)
Sampling cycle
PV deviation rate
upper limit event
operation
OFF
ON (up alarm)
OFF
PV deviation rate
lower limit event
operation
ON
OFF
ON
(1)
(2)
(3)
(4)
Sampling
Time
Set event
value
Set event value
Set event value
PV
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