Ss1 Ramp Time; Safely Limited Speed (Sls) - Danfoss VLT MCB 150 Operating Instructions Manual

Functions and System Overvi...
Parameter
42-44 Deceleration Rate
42-45 Delta V
42-46 Zero Speed
Table 3.2 Parameters for SS1 Ramp Slope
3 3
A
5
A Actual frequency
B SS1 Ramp
1 Activation of SS1 Ramp Slope
2 Activation of STO
3 42-44 Deceleration Rate
4 42-45 Delta V
5 42-46 Zero Speed
6 Safety function monitors
7 Activation of failure function
Illustration 3.9 SS1 Ramp Slope
When the Safe Stop 1 function is active, the frequency
converter brings the motor to zero speed. The deceleration
is monitored. If the monitored deceleration is slower than
expected or at zero speed, Safe Torque Off is triggered.
This safety function corresponds to a controlled stop of the
frequency converter according to EN IEC 60204-1, stop
category.

3.5.4.5 SS1 Ramp Time

Define a speed monitoring profile by a deceleration time
and a tolerable speed (Delta V).
18
Unit Range
RPM/s 1-30000 RPM/s
RPM 1-10000 RPM
RPM 1-600 RPM
7
3
4
6
6
B
1 2
Danfoss A/S © Rev. 2014-02-11 All rights reserved.
Operating Instructions
Default Parameter
1500 RPM/s 42-47 Ramp Time
120 RPM 42-45 Delta V
10 RPM 42-46 Zero Speed
Table 3.3 Parameters for SS1 Ramp Time
5
time
A Actual frequency
B SS1 ramp
1 Activation of SS1 Ramp Time
2 Activation of STO
3 42-47 Ramp Time
4 42-45 Delta V
5 42-46 Zero Speed
6 Safety function monitors
7 Activation of failure function Safe Torque Off
Illustration 3.10 SS1 Ramp Time

3.5.5 Safely Limited Speed (SLS)

NOTICE
The Safely Limited Speed function can only be used
when an encoder is connected to the safety option.
This function is used to limit a machine speed. The main
goal is to monitor the motor speed and to adjust the
speed to a set point. There are 2 types of Safely Limited
Speed
•
Unit Range
s 0.1 - 3600.0 s
RPM 1 - 10000 RPM
RPM 1 - 600 RPM
7
A
4
6
6
B
1 3 2
SLS without ramp: Monitors the motor speed and,
depending on the setting of 42-52 Fail Safe
Default
1.0 s
120 RPM
10 RPM
time
MG34W302