YOKOGAWA UT55A User Manual

8-15
IM 05P01C31-01EN
Control Functions
8.1.3 Cascade Secondary-loop Control, Cascade Secondary-loop Heating/
cooling Control, and Cascade Secondary-loop 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
CAS2: Cascade secondary-loop
control
CAS: Cascade control
BUM: Loop control for backup
PVSW:Loop
controlwithPV
switching
PVSEL:LoopcontrolwithPV
auto-selector
PVHD:LoopcontrolwithPV-hold
function
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 set up a controller as the secondary-loop controller when two
controllers are used for Cascade control.
They provide the target setpoint output function and tracking signal output function to the
primary-loop controller.
Cascade secondary-loop control can be used for Standard type or Heating/cooling type
controller.
Cascade secondary-loop heating/cooling control can be used for Heating/cooling type
controller.
Cascade secondary-loop 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)

YOKOGAWA UT55A Specifications

General

Brand	YOKOGAWA
Model	UT55A
Category	Temperature Controller
Language	English