58
Setting Output Specifications
Section 4-2
4-2-2
Control Output Method
The time-proportional output method is used for the control output.
The MV determines the percentage of time that the output is ON during each
control period.
Note
Control responsiveness improves as the control period is short-
ened, but if relays are being used for heater control, the relay life-
time will also be shortened so we recommend using a control
period of at least 20 seconds.
Note
This parameter can be set only when operation is stopped. If the parameter is
set to 0, the period will be 0.5 s.
4-2-3
Minimum output ON/OFF width
Set the minimum output ON/OFF width.
When using output relays, this function can be used to prevent the relay from
deteriorating. The relationship between MV and actual output is shown in the
following diagram.
Example:
When the control period is 10 s, the minimum output ON/OFF width is 10.0%,
and the MV is less than 10.0%, the output will be 0%. When the MV is 90.0%
or greater, the output will be 100%.
Variable type
Parameter name
Setting range
Default
E1/A1
Control Period 1 to 4
(I/O) 0 to 99 s
2
Conditions for use
Control output must be assigned and set to 2-PID control.
These parameters are not valid for outputs 1 and 2 on Con-
trollers with linear outputs.
ON
100%
80%
60%
40%
20%
Control
period
OFF
V1.2
MV %
0
100
100
Actual output %
Minimum output
ON/OFF width
Minimum output
ON/OFF width
Summary of Contents for EJ1 EtherCAT
Page 2: ...EJ1 Modular Temperature Controllers User s Manual Revised July 2008 ...
Page 3: ...iv ...
Page 19: ...xx ...
Page 213: ...188 Detailed Description of Services Section 6 4 ...
Page 227: ...202 Detailed Description of Services Section 7 5 ...
Page 303: ...278 Index ...
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