4 start-up – BECKHOFF EL7037 User Manual

Page 26

Product overview

All parameters required for sensorless operation can be found in the table "Overview of parameter settings
for individual operating modes [

}

124]".

Summary

In this mode, above a minimum speed the motor current without encoder is controlled load-dependent. In
this way it is possible to realise a particularly cost-effective drive in combination with high efficiency. The
achievable dynamic performance of the drive control is slightly reduced compared to the other operating
modes.

Advantages compared with standard mode

• Low current consumption (almost full load-dependence)

• High efficiency

• no encoder required

Prerequisites

• relatively high parameterisation effort required (speed controller + additional parameters)

• minimum speed required (if the speed is too low, the motor automatically switches to standard mode)

• dynamic performance somewhat lower than in standard mode

• Only possible with stepper motors from Beckhoff Automation (AS10xx)

2.4

Start-up

For commissioning: