Ssi Encoder - Siemens SINAMICS S120 Commissioning Manual

Identify encoder
Select the "Identify encoder" option in the encoder data if you want to read out the encoder
configuration from the encoder (only online).
Gear ratio / measuring gearbox
Gearboxes or measuring gearboxes are relevant only for some motor types, e.g. for 1FW3
torque motors. The gear ratio is the ratio of encoder revolutions (p0432) to the number of
motor or load revolutions (p0433) and is also termed the transmission ratio.
This information is contained in the motor data sheet.
A.6.6

SSI encoder

SSI encoder
SSI encoders use the SSI protocol for the data transfer. The SSI protocol is a serial data
transfer between an encoder and an evaluation module.
Note
Data sheet of the encoder being used
To parameterize the SSI protocol, it is absolutely necessary that you have the encoder data
sheet at hand. Use the information in the data sheet to set the protocol parameters. Not all
encoders support the parameterizable functions.
SSI encoder type
The following main settings can be made for the "SSI" encoder type:
● Motor encoder
This option is selected for each encoder inserted first (measuring system 1). When you
add an additional encoder that you want to use as motor encoder, you must activate the
option there. The option is then deactivated in the first added encoder.
● Rotary
Select this option when a rotary encoder is available.
● Linear
Select this option when a linear scale is available.
Power supply
The following settings can be selected for the power supply of your encoder:
● 5 V
● 24 V
● Remote sense;
remote sensing ensures that a possible voltage drop along the cable is compensated.
Commissioning with Startdrive
Commissioning Manual, 11/2017, 6SL3097-4AA10-0BP1
A.6 Overview of measuring systems / encoders
Appendix
423