Lenze 8400 User Manual

Lenze · 8400 HighLine · Reference manual · DMS 12.0 EN · 06/2017 · TD23 1490
17 Function library
17.1 Function blocks | L_ProcessCtrl_1
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17.1.143.1 Control characteristic
The dancer position or tension controller can be optionally operated as P, PI or PID controller. In the
Lenze setting, the PI algorithm is active.
Gain (P component)
The input value is controlled by a linear characteristic. The slope of the characteristic is determined
by the controller gain Vp.
The controller gain Vp is set in C01056/1
.
• The controller gain can be adapted via the nVpAdapt_a input (also possible in online mode).
•The nVpAdapt_a input value has a direct effect on the controller gain:
Example:
With the parameterised controller gain Vp = 2.0 and nVpAdapt_a = 75 %, the resulting
gain factor is as follows:
Reset time Tn (I component)
The adjustment time Tn is set under C01053/4
.
• The I component of the controller can be deactivated by setting the input bIOff to TRUE.
• The I component can be switched on and off online.
Differential component Kd (D component)
The differential component Kd is set under C01053/5
.
• The setting "0.0 s" deactivates the D component (Lenze setting). In this way, the PID controller
becomes a PI controller or P controller, if the I component has been deactivated as well.
Evaluation of the output signal (controller influence)
If the motor speed or motor torque is precontrolled, a low influence is sufficient for the controller to
comply with the setpoint.
Use the nInfluence_a input to select the influencing factor the controller correcting variable
(nOut_a) is to be evaluated with. The evaluated controller correcting variable is output at
nOutRed_a.
Switching on/off the controller
By setting the bReset input to TRUE, the process controller can be switched off.
 Note!
The controller influence evaluates the output signal multiplicatively. A change of the
nInfluence_a influencing factor also changes the dynamics of the controller!
P nVpAdapt_a C01056/1⋅=
P
75 [%]
100 [%]
-------------------
2.0⋅ 1.5==

Lenze 8400 Specifications

General

Category	DC Drives
Series	8400
Protection class	IP20
Control Type	Vector control
Communication	CANopen, PROFIBUS, Ethernet
Protection Features	Overcurrent, overvoltage, undervoltage, overtemperature
Input Voltage	AC 230/400/480 V