YOKOGAWA UP55A - Loop Control with PV Auto-Selector, HeatingCooling Loop Control with PV Auto-Selector, and Position Proportional Loop Control with PV Auto-Selector

8-29
IM 05P02C41-01EN
Control Functions
8.1.5 LoopControlwithPVAuto-selector,Heating/coolingLoopControlwith
PVAuto-selector,andPositionProportionalLoopControlwithPVAuto-
selector
SettingDetails
Parameter
symbol
Name
Display
level
Settingrange Menusymbol
CTLM Control mode STD
SGL: Single-loop control
CAS1: Cascade primary-loop
control
CAS: Cascade control
PVSW: Loop control with PV
switching
PVSEL: Loop control with PV
auto-selector
CTL
 CAUTION
• Someparameterswillbeinitializedifthecontrolmode(CTLM)ischanged.
• When using the ladder program, the control mode cannot be changed.
Description
These control modes automatically select or calculate the larger, the smaller, the
average, or difference of multiple (two to four) PV inputs for control.
Loop control with PV auto-selector can be used for Standard type or Heating/cooling type
controller.
Heating/cooling loop control with auto-selector can be used for Heating/cooling type
controller.
Position proportional loop control with auto-selector can be used for Position proportional
type controller.
► PIDcontrolandHeating/coolingcontrol:8.2SettingControlType(CNT)
Description about Loop control with PV auto-selector
► Inputselection:7.4UsingLarger,Smaller,Average,orDifferenceofTwotoFourInputsasPV
Uptofour10-segmentlinearizerapproximation/10-segmentlinearizerbiasescanbe
used for the input unit or output unit.
The Function block diagram describes only the basic functions.
Parameter symbols in the Function block diagram describe representative parameters.
For the functions and parameters which are not described in Function block diagram, see
the following.
► Contactinputassignment:12.1SettingContactInputFunction
► Contactoutputassignment:12.2SettingContactOutputFunction
► Contactoutputassignmenttoretransmissionoutputterminal:10.1SettingControlOutputType
► Analogoutputrangechange:10.14ChangingCurrentOutputRange
8
8.1SettingControlMode(CTLM)