YOKOGAWA UT55A - 9.3 Forcing SP to Track PV (PV Tracking)

9-4
IM 05P01C31-01EN
9.3 ForcingSPtoTrackPV(PVTracking)
Description
PVtrackingfunctionisusedtopreventabruptPVchanges.
WithPVtracking,
SPisfirstalignedwithPVandthenchangedtoitsoriginalSPatthe
SP ramp rate.
► SPramp-ratesettingfunction:9.2ChangingSPataFixedRate(SPRamp-RateSetting
Function)
PVtrackingfunctionworkswhen:
(1) Power is turned on or has recovered from a failure,
(2) SP number (SPNO) is changed,
(3) Operation mode is switched from STOP to RUN,
(4) Operation mode is switched from MAN to AUTO,
(5) Operation mode is switched from MAN to CAS (in Cascade control); or
(6) Output tracking flag is switched from ON to OFF (in Cascade primary-loop control or
Loop control for backup)
PV tracking enabled
MAN AUTO MAN AUTO
PV tracking disabled
PV
SP
PV
SP
Time Time
Mode switch Mode switch
Follows SP ramp rate
(set using UPR or DNR)
Setting Details
Parameter
symbol
Name
Display
level
Setting range Menusymbol
PVT PVtrackingselection STD OFF, ON SPS
Note1: In Cascade control, the LP2 lamp is lit while the Loop-2 parameter is displayed.