Sls - Safe Limited Speed; Introduction To The Sls Function; Time Monitoring - Danfoss Vacon OPTEA Operating Manual

VACON® NXP Advanced Safety Options
Operating Guide
The safe monitoring functions that take into account the direction of movement
• SMS
You can use all safe monitoring functions at the same time. All active safe monitoring functions monitor the limits that were set for
them. A violation of any of these limits causes the SQS function to be requested as a violation response.
The limit that a safe monitoring function monitors (for example speed, position, or acceleration) is used as a trigger for the SQS
function. Depending on the parameterization of the SQS function and the system configuration, there can be a delay for the
actions that control the movement of the motor.
The safe monitoring functions, except for SSM, do not monitor during violations, faults in the Advanced safety option board, or
when the STO or the SOS function is active.

6.3.2 SLS - Safe Limited Speed

6.3.2.1 Introduction to the SLS Function

The Safe Limited Speed (SLS) safety function monitors that the motor speed does not exceed the parameterized speed limit. The
SLS function provides 3 parameterizable speed limits that you can switch during operation: SLS 1 Limit, SLS 2 Limit, and SLS 3 Limit.
Deceleration during the initial activation can be monitored with a deceleration ramp. The SLS function can be configured with or
without ramp monitoring.
The violation response is the SQS function.
The parameters of the SLS safety function are described in

6.3.2.2 Time Monitoring

Speed
SLS x Limit
Illustration 50: The SLS Function in the Time Monitoring Mode
The time monitoring mode is always used when SLS is active. In the time monitoring, the SLS function must be reached before the
time that is set with SLS t1 elapses. The monitoring of the speed limit starts after the function is reached.
If the function is not reached in the set time, or the speed limit is exceeded after the function is reached, the SQS function becomes
active as a violation response.
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N O T I C E
8.8 SLS Parameters.
SLS td2
SLS t1
Safety Functions
t
AQ319736045637en-000101 / DPD01798