82
Setting Control Specifications
Section 4-3
• When an actuator with disproportional I/O, such as a phase-control-
type power regulator, is used
• When a rapidly heating heater is used
• When the control object or sensor has a long dead time
• When hunting occurs in normal mode for any reason
• Even when hunting occurs for PID constants when AT/ST
is exe-
cuted in normal mode, it is less likely to occur when AT/ST
is exe-
cuted in RT mode.
• When the temperature (PV) falls short of the set point for the PID con-
stants when using AT/ST
in normal mode, executing AT/ST
in
RT mode tends to improve performance.
• When the manipulated variable (MV) is saturated, the amount of over-
shooting may be somewhat higher in comparison to PID control based on
AT/ST
in normal mode.
Switching to and from RT
Note
This parameter can be set only when operation is stopped.
4-3-9
Disturbance Overshoot Adjustment Function
The Disturbance Overshoot Adjustment Function adjusts the control wave-
form when an external disturbance impacts the system.
• When using this function, set the Disturbance Overshoot Adjustment
Function parameter to 1 (Enabled).
• The disturbance response waveform can be adjusted with the Distur-
bance Gain and Disturbance Time Constant parameters.
V1.2
V1.2
Time
Set value
Start of control
Temperature
Much hunting occurs.
Time
Set value
Start of control
Temperature
Hunting is reduced.
V1.2
V1.2
Time
Set value
Start of control
Temperature
Time
Set value
Start of control
Temperature
V1.2
Variable type
Parameter name
Setting range
Default
E5/A5
RT
(Channel) 0: Disabled
1: Enabled
0
Conditions for use
The control method must be set to 2-PID control and the input
type must be a temperature input.
Variable type
Parameter name
Setting range
Default
E5/A5 (See note 1.)
Disturbance Overshoot Adjustment
Function
(Common)
0: Disabled
1: Enabled
0
Содержание EJ1 EtherCAT
Страница 2: ...EJ1 Modular Temperature Controllers User s Manual Revised July 2008 ...
Страница 3: ...iv ...
Страница 19: ...xx ...
Страница 213: ...188 Detailed Description of Services Section 6 4 ...
Страница 227: ...202 Detailed Description of Services Section 7 5 ...
Страница 251: ...226 Determining the Error from the Current Situation for Heater Burnout Alarm Errors Section 8 8 ...
Страница 303: ...278 Index ...
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