68
Setting Control Specifications
Section 4-3
■
Setting the Alpha
This parameter sets the 2-PID constant alpha (
α
).
Note
Normally, this parameter is left at its default value.
4-3-3
Selecting the Output Mode
Either standard control or heating/cooling control can be selected as the out-
put method.
Note
This parameter can be set only when operation is stopped.
Standard Control
This mode performs standard heating or cooling control. Set the Direct/
Reverse Operation parameter to reverse operation for heating control or direct
operation for cooling control.
■
Direct Operation (Cooling) and Reverse Operation (Heating)
Direct operation (cooling) refers to control where the manipulated variable is
increased in response to an increase in the process value. Alternatively,
reverse operation (heating) refers to control where the manipulated variable is
decreased in response to an increase in the process value.
For example, when the process value (PV) is lower than the set point (SP) in a
heating control system, the manipulated variable increases according to the
difference between the PV and SP. Accordingly, this is “reverse operation” in a
heating control system and “direct operation” in a cooling control system,
which performs the opposite operation.
Note
This parameter can be set only when operation is stopped.
Variable type
Parameter name
Setting range
Default
D5/95
Alpha
(Channel) 0.00 to 1.00
0.65
Conditions for use
The control method must be set to 2-PID control.
Variable type
Parameter name
Setting range
Default
E5/A5
Output Mode Selection
(Channel)
0: Standard control
1: Heating/cooling control
0
Conditions for use
No special conditions
Variable type
Parameter name
Setting range
Default
E5/A5
Direct/Reverse Operation
(Channel)
0: Reverse operation
1: Direct operation
0
Conditions for use
No special conditions
Time
Manipulated variable
Set value
100%
0%
Direct operation
Low
temperature
High
temperature
Reverse operation
Time
Manipulated variable
Set value
100%
0%
Low
temperature
High
temperature
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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