SEW-Eurodrive MOVITRAC LTP-B User Manual

9
Parameters
Explanation of the parameters
Operating Instructions – MOVITRAC
®
LTP-B
145
P3-16 PID fixed setpoint reference 4
Setting range: 0.0 – 100%
Sets the preset digital PID reference/setpoint.
9.2.5 Parameter group 4: Motor control (level 2)
P4-01 Operating mode/motor controller
• 0: VFC speed control
Vector speed control for induction motors with calculated rotor speed feedback
control. Field-oriented control algorithms are used for motor speed control. As the
calculated rotor speed is used to internally close the speed loop, this control mode
provides a simple closed-loop control system without physical encoder. For op-
timal control, auto tune (P4-02) should be carried out prior to first operation.
• 1: VFC torque control
Instead of the motor speed, the motor torque is controlled directly. In this operating
mode, the speed is not specified but changes depending on the load. The maxi-
mum speed is limited by P1-01. This operating mode is often used for winding ap-
plications where a constant torque is required to maintain cable tension. For op-
timal control, "auto tune" (P4‑02) should be carried out prior to first operation.
• 2: V/f speed control
With the operating mode V/f control, the output voltage and frequency are con-
trolled proportionally in the same ratio. Nearly all asynchronous motors can be
controlled in this way. If better performance is required with regard to motor control
mode, torque stability and speed range, the VFC control mode should be used.
– Slip compensation
If P1-10≠0 is set, the calculated slip speed is added to the output frequency.
If P1-10=0 is set, the slip is not included in the calculation. This causes the
motor to react very slightly to load changes and not have a tendency to vibrate.
SEW EURODRIVE recommends this motor control for fans, pumps, and applic-
ations with direct drive.
• 3: Synchronous motor speed control (PMVC)
Speed control for synchronous motors. The same properties apply as for VFC
speed control.
• 4: Synchronous motor torque control
Torque control for synchronous motors. The same properties apply as for VFC
torque control.
• 5: Synchronous motor position control
Position control for synchronous motors. Speed and torque setpoints are provided
via process data in Motion Protocol (P1-12 = 8). An encoder is required for this
purpose.
• 6: LSPM motor speed control
The LSPM control is a control type for asynchronous motors with synchronous
characteristics such as motors of type DR..J with LSPM technology from
SEW‑EURODRIVE.
25813137/EN – 08/2018

SEW-Eurodrive MOVITRAC LTP-B Specifications

General

Brand	SEW-Eurodrive
Model	MOVITRAC LTP-B
Category	DC Drives
Language	English