Functions; Acquisition Of Encoder Signals; Position Input With Ssi Absolute Encoder - Siemens SIMATIC ET 200SP Manual

Accessories
The following accessories can be used with the module and are not included in the product
package:
● Labeling strip
● Color identification labels
● Reference identification labels
● Shield connector
A BaseUnit of the A0 type is required to operate the technology module. For an overview of
the BaseUnits to be used with the technology module, refer to the product information on the
documentation for the ET 200SP Distributed I/O System
(http://support.automation.siemens.com/WW/view/en/73021864).
For detailed information on the installation procedure, refer to the ET 200SP Distributed I/O
System (http://support.automation.siemens.com/WW/view/en/58649293) system manual.
2.2

Functions

2.2.1

Acquisition of encoder signals

2.2.1.1

Position input with SSI absolute encoder

You can use the TM PosInput 1 technology module with an SSI absolute encoder for
position input. The technology module reads the position via a synchronous, serial interface
from the SSI absolute encoder and sends it to the controller.
You can switch the digital outputs of the technology module exactly at defined position
values, independently of the user program. Position input with an SSI absolute encoder does
not involve gate control.
Gray-dual conversion
Gray-code and dual-code SSI absolute encoders are supported.
Range for position value
You can specify a frame length of 10 bits to 40 bits for the SSI absolute encoder. The
configurable bit numbers of the LSB and the MSB of the position value in the frame define
the value range. The technology module can read in a position value with a maximum length
of 31 bits and transfer it to the PLC. The position value is treated as unsigned positive value
and can assume values between 0 and 2
Technology module TM PosInput 1 (6ES7138-6BA00-0BA0)
Manual, 02/2014, A5E33015755-AA
-1.
(MSB-LSB+1)
Product overview
2.2 Functions
11