3. The SS1 function
4. The SS2 function
When a higher priority function is requested while a lower priority function is active, it interrupts the lower priority function and
becomes active. The higher priority function behaves as it is parameterized. The lower priority function stays active, but it stops
monitoring.
When a lower priority function is requested while a higher priority function is active, the lower priority function does not become
active.
Speed
Logical level
SS2 Reached
SS1 Active
SS2 Active
Illustration 28: The SS1 Function Interrupts the SS2 Function. The Signal SS2 Active Stays Active but the Operation Stops
If a higher priority function interrupts a lower priority function, both functions must be not requested for the STO(+SBC) or the SOS
function to be deactivated.
If the SS1 function is requested when the SOS function is active (if, for example, the SS2 function is reached), the SS1 function acti-
vates the STO function after SS1 td2, without ramp or time monitoring.
6.2.2 STO - Safe Torque Off and SBC - Safe Brake Control
6.2.2.1 Introduction to the STO and SBC Functions
The Safe Torque Off (STO) safety function allows the drive output to be disabled so that the drive cannot generate torque to the
motor shaft.
AQ319736045637en-000101 / DPD01798 | 67Danfoss A/S © 2021.06
Safety Functions
VACON® NXP Advanced Safety Options
Operating Guide
To Next Page
Loading...
Need help?
General