Ss1 - Safe Stop; Introduction To The Ss1 Function - Danfoss Vacon OPTEA Operating Manual

VACON® NXP Advanced Safety Options
Operating Guide
Logical level
SS1 Request
Speed
SBC Speed
Zero Speed
Logical level
STO Active
SBC Reached
STO Reached
Acknowledgement
Illustration 34: The STO and SBC Signals when the SBC Function is Used, and the SS1 Function is Requested. SBC Order = SBC First. The SS1
Signals are Omitted from the Figure.

6.2.3 SS1 - Safe Stop 1

6.2.3.1 Introduction to the SS1 Function

The Safe Stop 1 (SS1) safety function monitors the motor deceleration and activates the STO(+SBC) function. Select the activation
settings of the STO(+SBC) function with the SS1 parameters.
The SS1 function can operate in one of the three monitoring modes:
• Time monitoring mode
• Time + zero speed monitoring mode
• Time + zero speed + ramp monitoring mode
The SS1 function can activate the STO function:
• When an application-specific time delay has passed (Time monitoring).
• When the speed reaches zero speed (Zero speed monitoring).
Danfoss A/S © 2021.06
Automatic acknowledgement
SS1 td1
Manual acknowledgement
SBC t1
Safety Functions
t
t
t
t
t
t
AQ319736045637en-000101 / DPD01798 | 73