Preventing the mechanical limit speed from being exceeded

To prevent the mechanical limit speed of the encoder from being exceeded, the following overspeed limits are monitored by the MOVISAFE® CSS..A safety options:

Encoder type

Overspeed limit
in min-1

Mechanical
encoder limit speed
in min−1

AK0H, EK0H

6329

9000

AK1H, AK8H

6445

12000

E.7S, EK8S

5500

6000

A.7W, AK8W, EK8W

5500

6000

EK8Z/AK8Z

5500

6000

EK9Z

5500

6000

EK0Z/AK0Z

6329

9000

The overspeed limit for the CSA31A safety option can be parameterized in the Assist CS.. tool in the "Encoder functions" tab.

INFORMATION

Exceeding the overspeed limit results in an error message in the safety option with the error response "STO" within 11 ms for the sin/cos encoder or 17 ms for safety encoders with MOVILINK® DDI. The error response is executed by the STO circuit within another 2 ms.
Measures in the application must ensure that the mechanical limit speed is not reached during this time (11 ms/17 ms).