Speed
Logical level
Logical level
SS2 Request
STO Active
SS2 Reached
SOS Reached
Zero speed
Position deviation
Reset
SOS
Revolution
Limit
SS2 td2
SS2 td1
t
t
t
SS2 Active
t
t
t
t
t
Violation
e30bi346.10
Illustration 46: The SS2 and SOS Signals in a SOS Violation Case
6.2.5 SQS - Safe Quick Stop
6.2.5.1 Introduction to the SQS Function
The SQS function has 3 modes: SQS-STO, SQS-SS1, and SQS-SS2. The behavior of these modes is the same as the corresponding
independent function.
Ramps for SQS-SS1 and SQS-SS2 are set independently of other ramp definitions. For the STO(+SBC) function and the SOS function,
the parameters of the individual functions are also used if they are activated as part of the SQS function.
The Safe Quick Stop (SQS) safety function becomes active as the violation response for these safety functions: SLS, SSR, SMS.
The parameters of the SQS safety function are described in 8.7 SQS Parameters.
AQ319736045637en-000101 / DPD0179884 | Danfoss A/S © 2021.06
Safety Functions
VACON® NXP Advanced Safety Options
Operating Guide
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