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– 101 –
9
Chapter
PV<SV
PV>SV
PV
ON
OFF
control
output
t
SV
set value
HYS
PV
ON
OFF
control
output
t
SV
set value
PV<SV
PV>SV
HYS
Control Method
This controller has five temperature control functions
and three valve control functions. Select the best
combination for the current application.
●
Temperature Control Functions
ON/OFF (2 setting) control
Operates as ON/OFF control when the PID parameter ("
PPP
P
") is
set to 0.0 ("
PPP
Piiiidddd CCCChhhh 2222
").
ON/OFF control switches the control output to ON (100%) or
OFF (0%) according to the SV/PV magnitude relationship.
The output hysteresis can be set under the parameter "
hhh
hYYYYSSSS
"
("
PPP
Piiiidddd CCCChhhh 2222
").
Reverse Operation (Heating)
Method used to control the electrical heating furnace. Set the
hYS to an appropriate value according to the control target.
Normal Operation (Cooling)
Method used to control the cooling machine.
ON/OFF (2 settings)
Control
Switches output control ON/OFF according
to the SV/PV magnitude relationship.
Control systems can be built from simple
elements such as SSR. This is appropriate
for situations which require a low degree of
accuracy.
PID Controls
PID calculation and controls proceed
according to the previously set PID
parameters.
PID parameters can be set manually or
through auto-tuning (AT).
It is the most basic control in this
equipment.
Fuzzy PID Control
Reduces the amount of overshoot during
control.
It is effective when you want to suppress
overshoot while changing SV, even during
processes where it may take a long time to
reach the target value.
Self-tuning Control
Adds controls while automatically
calculating PID to meet the control target or
changing SV. It is effective when the control
conditions change frequently.
Pid2 Control
Suppresses the amount of overshoot
during control for processes that turn the
control target off and then on again. It is
effective when the control target turns on
and off while power flows continuously to
the temperature controller.
Parameter
Set Value
"
PPP
P
"
0.0
"
rrr
rEEEEvvvv
"
rv--
"
hhh
hYYYYSSSS
"
Optional
Parameter
Set Value
"
PPP
P
"
0.0
"
rrr
rEEEEvvvv
"
no--
"
hhh
hYYYYSSSS
"
Optional
Point
• During ON/OFF control, the I and D settings do not
affect control.
• This unit has five temperature control functions.
Select the best function for the current application.
• If the hysteresis width is narrow, and PV and SV are
nearly equal, the output may frequently switch on and
off. Note that doing so may affect the operation life of
the contact output.
Содержание PXG4
Страница 1: ...c...
Страница 10: ...9 1 Chapter Chapter 1 Part Names and Functions Part Names and Functions 10...
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Страница 71: ...70 MEMO 7 Chapter...
Страница 89: ...88 MEMO 8 Chapter...
Страница 106: ...105 9 Chapter Behavior when control is lost Limit Cycle PV SV Time tuning MV control lost 100...
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Страница 125: ...124 MEMO 11 Chapter...
Страница 131: ...130 MEMO 12 Chapter...
Страница 132: ...131 13 Chapter Chapter 13 Password Setup Ch11 Overview of Password Setup Ch11 132 Passwords 1 to 3 132...
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Страница 151: ...150 MEMO 15 Chapter...
Страница 152: ...151 16 Chapter Chapter 16 Troubleshooting Troubleshooting 152...
Страница 154: ...153 17 Chapter Chapter 17 Appendix Delay Start Function 154 Return to Factory Default Setting Function 155...
Страница 157: ...156 MEMO 17 Chapter...