Sms - Safe Maximum Speed; Introduction To The Sms Function; The Maximum Speed Monitoring - Danfoss Vacon OPTEA Operating Manual

VACON® NXP Advanced Safety Options
Operating Guide
Logical level
SLS 3 Limit
SLS 2 Limit
SLS 1 Limit
SLS Request
Speed
SLS 1 limit
Logical level
SLS 1 Active
SLS 1 Reached
SQS Active
& STO Active
SQS Reached
& STO Reached
Reset
Illustration 54: An SLS Ramp Violation. The SQS-STO Function as a Violation Response.

6.3.3 SMS - Safe Maximum Speed

6.3.3.1 Introduction to the SMS Function

The Safe Maximum Speed (SMS) safety function monitors that the motor speed does not exceed the parameterized speed limit. The
limit can be set independently for both the rotation directions of the motor.
The violation response is the SQS function.
The parameters of the SMS safety function are described in

6.3.3.2 The Maximum Speed Monitoring

The maximum speed monitoring starts immediately when the SMS function is requested and becomes active. If the limits are not
violated, the function stays in the Reached state.
96 | Danfoss A/S © 2021.06
SLS td1
SLS t1
Violation
8.9 SMS Parameters.
Safety Functions
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AQ319736045637en-000101 / DPD01798