YOKOGAWA UT Advanced UT32A, Руководство пользователя

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9-2
IM 05P01D31-01EN
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.
Velocity (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