Omron E5AZ User Manual

61
Executing Heating/Cooling Control Section 4-4
4-4 Executing Heating/Cooling Control
4-4-1 Heating/Cooling Control
Heating/cooling control can be used on E5@Z-@3@@ controllers. Heating/
cooling control operates when “h-c: heating/cooling” is selected in the “stan-
dard or heating/cooling” parameter (initial setting level). Select the standard
heating control or cooling control according to the following table:
(Parameter default is heating control (standard).)
• When heating/cooling control is selected, the “cooling coefficient” and
“dead band” parameters can be used.
Cooling coefficient If the heating/cooling characteristics of the control target greatly differ, pre-
venting satisfactory control characteristics from being obtained by the same
PID constants, adjust the proportional band (P) at the cooling side using the
cooling coefficient to balance control between the heating/cooling sides. In
heating/cooling control, P at the heating or cooling side is calculated by the
following formula:
Control output 1 side P = P
Control output 2 side P = P
× cooling coefficient
The cooling coefficient is applied to control output 1 side P to obtain control
whose characteristics (control output 2 side P) differ from those on the control
output 1 side.
Dead band The dead band is set with the set point as its center on the E5@Z-@3@@.
The dead band width is the set value of the “dead band” parameter (adjust-
ment level). Setting a negative value produces an overlap band.
Default is “0.0EU.”
Setting Output
Control Method Direct/reverse
operation
Control output 1 Control output 2
Standard control Reverse operation Control output
(heat)
-
Standard control Direct operation Control output
(cool)
-
Heating/cooling
control
Reverse operation Control output
(heat)
Control output
(cool)
Heating/cooling
control
Direct operation Control output
(cool)
Control output
(heat)
Output
Control
output
1 side P
Set point
Control output 1 side P × 0.8
Control output 1 side
P × 1.0
Control output 2 side P
Output
Control output 1 side
P × 1.0
Set point
Control output 1 side P × 1.5
0 0
PV PV
Control
output
1 side P
Control output 2 side P

Omron E5AZ Specifications

General

Brand	Omron
Model	E5AZ
Category	Temperature Controller
Language	English