YOKOGAWA UP55A - Cascade Control, Cascade HeatingCooling Control, and Cascade Position Proportional Control

8-13
IM 05P02C41-01EN
Control Functions
8.1.3 CascadeControl,CascadeHeating/coolingControl,andCascade
Position Proportional Control
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
P VSEL: Loop control with PV auto-
selecto r
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 use two control computation units and permits Cascade control
usingjustasinglecontroller.
Cascade control can be used for Standard type or Heating/cooling type controller.
Cascade heating/cooling control can be used for Heating/cooling type controller.
Cascade position proportional control can be used for Position proportional type
controller.
► PIDcontrolandHeating/coolingcontrol:8.2SettingControlType(CNT)
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)