Siemens SINUMERIK MC User Manual

4.19 Safe actual value acquisition
4.19.1 Reliable actual value acquisition with 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
Note
Rules for connecting 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.
Note
No "Safe Acceleration Monitoring" for encoder faults in a 1-encoder system
For an encoder fault in a 1-encoder system, the "Safe Acceleration Monitoring" function
(p9506 = 3) is not active.
A Category 0 or 1 stop response (EN 60204‑1) can be set with parameter p9516.4.
Safety functions integrated in the drive
4.19 Safe actual value acquisition
Safety Integrated (with SINAMICS S120)
Commissioning Manual, 02/2020, A5E46305916B AB 191

Siemens SINUMERIK MC Specifications

General

Brand	Siemens
Model	SINUMERIK MC
Category	Control Systems
Language	English