Parameter
Unit
Range
Default
42-44 Deceleration Rate
RPM/s 1-30000 RPM/s 1500 RPM/s
42-45 Delta V
RPM
1-10000 RPM
120 RPM
42-46 Zero Speed
RPM
1-600 RPM
10 RPM
Table 3.2 Parameters for SS1 Ramp Slope
130BC319.10
6
4
3
7
1
2
5
time
fr
equen
cy
6
A
B
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).
Parameter
Unit
Range
Default
42-47 Ramp Time
s
0.1 - 3600.0 s
1.0 s
42-45 Delta V
RPM
1 - 10000 RPM
120 RPM
42-46 Zero Speed
RPM
1 - 600 RPM
10 RPM
Table 3.3 Parameters for SS1 Ramp Time
130BC320.10
6
4
7
1
2
5
time
fr
equen
cy
6
3
A
B
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
•
SLS without ramp: Monitors the motor speed and,
depending on the setting of
42-52 Fail Safe
Functions and System Overvi...
Operating Instructions
18
Danfoss A/S © Rev. 2014-02-11 All rights reserved.
MG34W302
3
3