Pid Parameters - Lenze SMV Series Operating Instructions Manual

Commissioning
4.5.4

PID Parameters

Code
No. Name
PID Mode
P200
EN
PID Feedback
p201
Source
PID Decimal Point
p202
PID Units
p203
(2)
Feedback at
p204
Minimum Signal
Feedback at
p205
Maximum Signal
Proportional Gain
p207
Integral Gain
p208
Derivative Gain
p209
PID Setpoint Ramp
p210
Minimum Alarm
p214
Maximum Alarm
P215
Preset PID Setpoint
P231
#1
28
Possible Settings
Default Selection
0 0 Disabled
1 Normal-acting
2 Reverse-acting
3 Normal-acting, Bi-directional
4 Reverse-acting, Bi-directional
NOTE
To activate PID mode, one of the TB-13 inputs (P121...P124) must be used to select
the Auto Reference that matches the desired PID setpoint reference. If the selected
PID setpoint reference uses the same analog signal as the PID feedback (P201), an
F.IL fault will occur.
Example: The desired PID setpoint reference is the keypad (p and q). Set TB-13x = 6
(Auto Reference: Keypad):
• TB-13x = closed: PID mode is active
• TB-13x = open: PID mode is disabled and the drive speed will be controlled by the
reference selected in P101.
0 0 4-20 mA (TB-25)
1 0-10 VDC (TB-5)
2 Drive Load (P507)
3 Feedback from Network
1 0 PID Display = XXXX
1 PID Display = XXX.X
2 PID Display = XX.XX
3 PID Display = X.XXX
4 PID Display = .XXXX
0 0 %
1 /UNITS
2 AMPS
3 NONE
0.0 -99.9
100.0 -99.9
5.0 0.0 {%}
0.0 0.0 {s}
0.0 0.0 {s}
NOTE
• Derivative Gain is very sensitive to noise on the feedback signal. Use with care.
• Derivative Gain is not normally required in pump and fan applications
20.0 0.0 {s}
0.0 P204
0.0 P204
0.0 P204
IMPORTANT
• Normal-acting: As feedback increases,
motor speed decreases
• Reverse-acting: As feedback increases,
motor speed increases
• PID mode is disabled in Vector Torque mode
(P300 = 5)
• Selections 3, 4: If P112=1, PID controller
output sets the speed, (range -max freq
to +max freq)
Must be set to match the PID feedback signal
Applies to P204, P205, P214, P215, P231...
P233, P242, P522, P523
Select the UNITS LED that will be illuminated
when the drive is running in PID control mode
3100.0 Set to match the range of the feedback signal
being used
3100.0 Example: Feedback signal is 0 - 300 PSI; P204
= 0.0, P205 = 300.0
1000.0 Used to tune the PID loop:
• Increase P207 until system becomes
20.0
unstable, then decrease P207 by 10-15%
20.0
• Next, increase P208 until feedback matches
setpoint
• If required, increase P209 to compensate for
sudden changes in feedback
100.0 • time of setpoint change from P204 to P205
or vice versa.
• Used to smooth the transition from one PID
setpoint to another, such as when using the
Preset PID Setpoints (P231...P233)
P205 Use with P140, P142 = 18...23
P205
P205 TB-13A activated; P121 = 3 and P200 = 1 or 2
EDBSV571 EN 1.0