YOKOGAWA UP35A User Manual

8-12
IM 05P02D41-01EN
8.2.3 Heating/cooling Control
Description
Heating/cooling control can be used only for Heating/cooling type.
In Heating/cooling control, the controller outputs the result of computation after splitting it
into heating-purpose and cooling-purpose signals. PID control or ON/OFF control can be
selected for each of the heating side and the cooling side.
Set the heating-side proportional band to “0” to perform ON/OFF control on the heating
side. Set the cooling-side proportional band to “0” to perform ON/OFF control on the
cooling side.
Control computation
0 to 100%
Heating/cooling computation
0 to 50%
Cooling-side output limiter
Cooling-side control output
0 to 100%
Heating-side control output
0 to 100%
50 to 100%
Heating-side output limiter
PV SP
Manual control output
COM
DetailsofHeating/coolingControl
In Heating/cooling control, PID control or ON/OFF control can be selected for each of the
heating side and the cooling side.
Set the proportional band to “0” to perform ON/OFF control.
The following describes the combination of heating side and cooling side.
WhenBoththeHeatingSideandCoolingSideareinPIDControl
The following shows the formula and operation example.
HOUT =
( OUT – – 50% ) × 2
2
DB
*: OUT: control output, HOUT: heating-side control output,
COUT: cooling-side control output, P: heating-side proportional band,
Pc: cooling-side proportional band, and DB: dead band
C
OUT = ( 50% – OUT – ) × 2 ×
2
DB
Pc
P
8.2SettingControlType(CNT)

YOKOGAWA UP35A Specifications

General

Brand	YOKOGAWA
Model	UP35A
Category	Controller
Language	English