YOKOGAWA UT55A User Manual

8-31
IM 05P01C31-01EN
Control Functions
8.1.5 LoopControlforBackup,Heating/coolingLoopControlforBackup,and
PositionProportionalLoopControlforBackup
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
P VSEL:LoopcontrolwithPVauto-
selecto r
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 allow control in connection with host control equipment (such
as another controller or programmable controller (PLC)). If the host control equipment
breaks down and the controller receives the FIAL signal, the controller performs backup
control operations.
Loop control for backup can be used for Standard type or Heating/cooling type controller.
Heating/cooling loop control for backup can be used for Heating/cooling type controller.
Position proportional loop control for backup 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