Safety-Related Function SS1

Overview

The safety-related function SS1 (Safe Stop 1) monitors the deceleration and removes the motor torque once standstill has been reached (type SS1-r, ramp-monitored).

When the safety-related function is triggered:

  • The deceleration of the movement is monitored with the specified monitoring ramp eSM_dec_Qstop until standstill is reached.

  • After a standstill has been reached, the safety-related function STO is triggered.

Parameter name

HMI menu

HMI name

Description

Unit

Minimum value

Factory setting

Maximum value

Data type

R/W

Persistent

Expert

Parameter address via fieldbus

eSM_dec_Qstop

eSM deceleration ramp for Quick Stop.

Deceleration ramp for monitored Quick Stop. This value must be greater than 0.

Value 0: eSM module is not configured

Value >0: Deceleration ramp in RPM/s

Type: Unsigned decimal - 4 bytes

Write access via Sercos: CP2, CP3, CP4

Setting can only be modified if power stage is disabled.

RPM/s

0

0

32786009

UINT32

R/W

per.

-

-

Response to Exceedance of Limit Value

If the monitored limit value is exceeded (for a maximum of 4 times):

  • An error is detected.

  • The safety-related function STO is triggered.

  • The number of times the limit value is exceeded is stored (1 ... 4).

If the monitored value is exceeded for the fifth time:

  • The safety-related function STO is triggered.

  • An error of error class 4 is detected.