YOKOGAWA UT55A User Manual

9-2
IM 05P01C31-01EN
9.2 ChangingSPataFixedRate(SPRamp-Rate
SettingFunction)
Description
SP ramp-rate setting function forces SP to change at a fixed rate when SP is changed in
order to prevent abrupt changes in SP.
V
elocity(rate-of-change)
canbesetforboththeSPramp-uprate(UPR)andSPramp-
down rate (DNR). Set the ramp–rate time unit (TMU) per hour or minute.
The SP ramp-rate setting function works when:
(1)
SP is changed.
(2) SP is changed
by switching SP
number (SPNO).
(3) Poweris
turnedonorhasrecoveredfromafailure(PVtracking=ON);or
(4) OperationmodeisswitchedfromMANtoAUTO(PVtracking=
ON).
SPramp-ratesetting
actionstartsfromPVwhenthePVtrackingfunctionisused.
(1) When SP is changed (2) When SP No. (SPNO) is switched
(3) When power is turned on (or power has recovered)
(4) When operation mode is switched from MAN to AUTO
Old SP
New SP
Specified ramp rate
Specified ramp rate
Specified ramp rate
SP change
Power-on or
Switch from MAN to AUTO
Time Time
PV input range
Time
SP
PV
SP of group 1/SP of group 2 switch
SP of group 2
SP of group 1
Increases
according
to UPR
Increases
according
to UPR
Switch
from SP of group 1
to SP of group 3
SP of group 1 SP of group 1
(PID of group 1) (PID of group 1)
SP of group 3
(PID of group 3)
SP of group 2
(PID of group 2)
Time
SP
Decreases
according
to DNR
Switch
from SP of group 3
to SP of group 1
Switch
from SP of group 1
to SP of group 2

YOKOGAWA UT55A Specifications

General

Brand	YOKOGAWA
Model	UT55A
Category	Temperature Controller
Language	English