Honeywell DCP552 Mark II - Manual (Page 57)

5-11
● PV deviation rate event
PV deviation is measured in each sampling cycle set using the event configuration
data setting while on/off states are determined by comparing event setting
deviation rate ∆PVs.
PV deviation 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.
Chapter 5. FUNCTIONS
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
(2) (3) (4) Sampling (1)
Time
Set event
value
Set event value
Set event value
PV
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