Control features

Control modes

• Pulse train input position control (PTI), with torque and speed limit
• Internal position control (IPos), setpoints selected using a combination of digital inputs (traversing blocks)
• Speed control (S), via analog input or fixed internal speed setpoint, with torque limit
• Torque control (T), via analog input or fixed internal torque setpoint, with speed and torque limits
• Control mode switchover, e.g. switchover from position control to speed control on-the-fly via digital input
• Jog using buttons on the integrated operator panel (BOP)

Speed control mode

Speed control range 

Analog speed command: 1:2000

Internal speed command:1:5000

Analog speed input 

-10 V DC ... +10 V DC/rated speed

Torque limit 

Set using a parameter or analog input command

Pulse train input position control

Max.input pulse frequency

High-speed differential line driver (5 V), 1 MHz 
optocoupler (24 V), 200 kHz

Multiplying factor

Electronic gear ratio (A/B), A:1-65535, B:1-65535, 1/50

In-position range

0 ... ± 1000 pulses (command pulse unit)

Torque limit 

Set using a parameter or analog input command

Torque control

Analog torque input 

-10 V DC ... +10 V DC/max. torque (input impedance >25 kΩ )

Speed limit 

Set using a parameter or an analog input command

Control functions

Real time auto tuning 

Estimates the machine characteristic and sets the closed-loop control parameters (gain, integral, etc.) continuously in real time without any user intervention

Resonance suppresses 

Suppresses the mechanical resonance, such as workpiece and foundation vibration

One-button tuning

Optimizes the control parameters such as position loop gain, speed loop gain, speed loop integral time, mechanical resonance frequency etc. by just clicking one button on the operator panel or SINAMICS V-ASSISTANT

Gain switch

Switches between gains using an external signal or internal operating conditions to reduce noise, shorten positioning time and improve the operational stability of a servo system

PI/P control switch 

Switches from PI control to P control with an external signal or internal operating conditions

Speed and torque limit 

Limits motor speed using an external analog speed limit command 
(0 ... ±10 V DC) or internal speed limit commands (up to three groups)

DI/DO parameterization 

Freely assigns the control signals to 8 digital inputs and 6 digital output

External braking resistor 

An external braking resistor can be used when the internal braking resistor is not capable of handling the regenerative energy

Position smoothing 

Transforms position characteristics from the pulse train input setpoint into an S-curve profile with a parameterized time constant

Measuring machine function 

The machine frequency characteristics are analyzed using SINAMICS V-ASSISTANT

Zero speed clamp 

Stops motor and locks motor axis when motor speed setpoint is below a parameterized threshold level

SD card 

SD card for parameter cloning and FW update

Safety functions 

Safe torque off (STO) via terminal

Operator Panel (OP) 

Integrated, 6-digit/7-segment display, 5 buttons

PC tool 

SINAMICS V-ASSISTANT engineering tool exclusively for SINAMICS V90