Safe Actual Value Acquisition; Notes Regarding Safe Actual Value Sensing Using An Encoder System - Siemens Sinamics S120 Function Manual

4.2.18

Safe actual value acquisition

4.2.18.1

Notes regarding safe actual value sensing using an encoder system

Supported encoder systems
The following encoder systems can in principle be used for safety-relevant speed/position
acquisition:
● Single-encoder systems
or
● 2-encoder systems
Not e
Rules f or c onnecting an encoder
Note when connecting an encoder the valid rules: See SINAMICS S120 Drive Functions
Function Manual.
Single-encoder system
In a single-encoder system, only the motor encoder is used to safely acquire the drive actual
values. This motor encoder must be appropriately suitable (see encoder types). The actual
values are generated in a safety-relevant fashion either directly in the encoder or in the
Sensor Module and are transferred to the Control Unit via DRIVE-CLiQ.
For motors without a DRIVE-CLiQ interface, the connection is made using additional Sensor
Modules.
Even if the drive is operating in the closed-loop torque controlled mode, motion monitoring
functions may be selected as long as it is guaranteed that the encoder signals can be
evaluated.
Not e
No " S afe acceleration monitoring" for encoder faults in a 1-encoder s ystem
For an encoder fault in a 1-encoder system, the "Safe acceleration monitoring" function
(p9506 = 3) is not active.
A stop response, Category 0 or 1 (EN 60204-1), can be set using parameter p9516.4.
Safety Integrated
Function Manual, (FHS), 07/2016, 6SL3097-4AR00-0BP6
Description of Safety Integrated functions
4.2 Safety Integrated Extended Functions
147