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4 Basic Operation
E5@C Digital Temperature Controllers User’s Manual (H174)
4-
8 Usin
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4
4-8-1 ON/OFF
Control
4-8
Using ON/OFF Control (Not
Supported for Position-proportional
Models.)
In ON/OFF control, the control output turns OFF when the temperature being controlled reaches the
preset set point. When the manipulated variable turns OFF, the temperature begins to fall and the con-
trol turns ON again. This operation is repeated over a certain temperature range. At this time, how
much the temperature must fall before control turns ON again is determined by the Hysteresis (Heating)
parameter. Also, what direction the manipulated variable must be adjusted in response to an increase
or decrease in the process value is determined by the Direct/Reverse Operation parameter.
• Switching between 2-PID control and ON/OFF control is performed using the PID ON/OFF parameter
in the Initial Setting Level. When this parameter is set to
pid
, 2-PID control is selected, and when it is
set to
onof
, ON/OFF control is selected. The default is
onof
.
z
Hysteresis
• With ON/OFF control, hysteresis is used to stabilize operation when switching between ON and
OFF. The control output (heating) and control output (cooling) functions are set in the Hysteresis
(Heating) and Hysteresis (Cooling) parameters, respectively.
• In standard control (heating or cooling control), the setting of the Hysteresis (Heating) parameter
in the Adjustment Level is used as the hysteresis regardless of whether the control type is heating
control or cooling control.
4-8-1
ON/OFF Control
Hysteresis
Reverse operation
OFF
OFF
OFF
Time
ON
ON
ON
ON
SP
Heater
0
Temperature
Содержание E5C series
Страница 2: ......
Страница 18: ...Conventions Used in This Manual 16 E5 C Digital Temperature Controllers User s Manual H174 ...
Страница 34: ...1 Introduction 1 10 E5 C Digital Temperature Controllers User s Manual H174 ...
Страница 98: ...3 Part Names and Basic Procedures 3 20 E5 C Digital Temperature Controllers User s Manual H174 ...
Страница 310: ...6 Parameters 6 94 E5 C Digital Temperature Controllers User s Manual H174 ...
Страница 326: ...7 User Calibration 7 16 E5 C Digital Temperature Controllers User s Manual H174 ...
Страница 364: ...A Appendices A 38 E5 C Digital Temperature Controllers User s Manual H174 ...
Страница 365: ...Index 1 E5 C Digital Temperature Controllers User s Manual H174 I Index ...
Страница 370: ...Index 6 E5 C Digital Temperature Controllers User s Manual H174 ...