Danfoss VLT Safety Option MCB 150 User Manual

3.5.5.2.1 Configuring SLS Operation
Procedure
1. If a safe speed limit must be monitored, set 1 of the 2 safe digital inputs, DI1 or DI2, to [1] SLS-a or [2] SLS-b in parameter 42-20 Safe
Function.
2. Select input type in parameter 42-21 Type.
3. Select parameter 42-53 Start Ramp to run Safely Limited Speed with monitored braking ramp. The default value is [0] No for
applications without SLS Ramp control.
4. Set the time allowed to reach Safe Limited Speed in parameter 42-54 Ramp Down Time.
When the safety option actively monitors Safely Limited Speed, and the motor speed is at or below the configured safe speed
limit, the function monitors the speed until the function is deactivated.
5. Set the value in parameter 42-50 Cut Off Speed.
Example:
e30bc323.11
1
2
f
3
5
6
4
t
4
7
A
B
A Actual frequency
1 SLS is activated with SS1 Ramp
3 Ramp-down time
5 0 speed limit, fixed value of 120 RPM
7 Activation of failure function set in parameter 42-52 Fail Safe
Reaction
B SLS limit
2 SLS speed limit reached
4 Delta speed limit
6 Cut-off speed
Illustration 14: SLS with Ramp
Table 7: Parameters for SLS with Ramp
Parameter Unit Range Default
Parameter 42-50 Cut Off Speed RPM 120–10000 RPM 270 RPM
Functions and Systems Overview
Installation Guide | VLT® Safety Option MCB 150/151
AQ279747441421en-000101 / 130R0292
30 | Danfoss A/S © 2018.09

Danfoss VLT Safety Option MCB 150 Specifications

General

Brand	Danfoss
Model	VLT Safety Option MCB 150
Category	Control Unit
Language	English