AC International Lenze SV01B - Manual (Page 26)

ENGLISH 25
Commissioning
4.5.4 PID Parameters
Code Possible Settings
IMPORTANT
No. Name Default Selection
PID Mode 0 0 Disabled • Normal-acting: As feedback
increases, motor speed decreases
• Reverse-acting: As feedback
increases, motor speed increases
• PID mode is disabled in Vector
Torque mode (P00 = 5)
 Normal-acting
2 Reverse-acting
Note
To activate PID mode, one of the TB- inputs (P2...P2) 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 (P20), an
fault will occur.
Example: The desired PID setpoint reference is the keypad (s and t).
Set TB-x =  (Auto Reference: Keypad):
• TB-x = closed: PID mode is active
• TB-x = open: PID mode is disabled and the drive speed will be
controlled by the reference selected in P0.
PID Feedback
Source 0 0 4-20 mA (TB-25) Must be set to match the PID feedback
signal
 0-0 VDC (TB-5)
PID Decimal
Point  0 PID Display = XXXX Applies to P204, P205, P24, P25,
P2...P2, P242, P522, P52
 PID Display = XXX.X
2 PID Display = XX.XX
 PID Display = X.XXX
4 PID Display = .XXXX
Feedback at
Minimum Signal 0.0 -99.9 00.0 Set to match the range of the feedback
signal being used
Example: Feedback signal is 0 - 00
PSI; P204 = 0.0, P205 = 00.0
Feedback at
Maximum Signal 00.0 -99.9 00.0
Proportional Gain 5.0 0.0 {%} 00.0 Used to tune the PID loop:
• Increase P207 until system becomes
unstable, then decrease P207 by
0-5%
• Next, increase P208 until feedback
matches setpoint
• If required, increase P209 to
compensate for sudden changes in
feedback
Integral Gain 0.0 0.0 {s} 20.0
Derivative Gain 0.0 0.0 {s} 20.0
Note
• Derivative Gain is very sensitive to noise on the feedback signal and
must be used with care
• Derivative Gain is not normally required in pump and fan applications
PID Setpoint
Ramp 20.0 0.0 {s} 00.0 • 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
(P2...P2)