26
Chapter 2 - Front Panel Operation
Autotune PID Operation
4. Confi gure LFI-3751 for Autotune
A. Setpoint Response Tuning
•
Rotate the
Display Select Switch
to
P
(
Shift Button
ON
).
•
While the output current is disabled, rotate the
Digi-Pot Adjust Knob
counter-clockwise to change the value displayed to AutS. Wait about two
seconds before starting an Autotune sequence.
•
Rotate the
Display Select Switch
to
I
(
Shift Button
ON
).
•
Rotate the
Digi-Pot Adjust Knob
to change the value displayed. If I = 0,
Autotune will optimize your system without an integrator. If I
K
0, Autotune
will optimize your system with the integrator function.
•
Rotate the
Display Select Switch
to
D
(
Shift Button
ON
).
•
Rotate the
Digi-Pot Adjust Knob
to change the value displayed. If D = 0,
Autotune will optimize your system without a differentiator. If D
K
0,
Autotune will optimize your system with the differentiator function.
•
Refer to pages 30 & 31 for a discussion of the integrator and differentiator
functions.
•
RS-232 Command:
[P], [I], [D]
P
ACT T
LIM I
AUX T
TE V
SET T
TE I
B
C
I
A
D
P
ACT T
LIM I
AUX T
TE V
SET T
TE I
B
C
I
A
D
P
ACT T
LIM I
AUX T
TE V
SET T
TE I
B
C
I
A
D
decrease
increase
Proportional Gain
Differentiator Time Constant
Integral Time Constant
Summary of Contents for LFI-3751
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Page 13: ...1 Chapter 1 Quick Start 13 1 ...
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Page 21: ...2 Chapter 2 Front Panel Operation 21 2 ...
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Page 68: ...68 This page intentionally left blank ...
Page 69: ...3 Chapter 3 Rear Panel Operation 69 3 ...
Page 75: ...3 4 Chapter 4 Remote Interface Reference 75 4 ...
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Page 127: ...5 Chapter 5 Specifications 127 5 ...
Page 131: ...Appendix CAT 220 Cable Accessory Diagram 131 ...