130BC323.10
1
2
fr
equen
cy
3
5
6
4
time
4
7
A
B
A
Actual frequency
B
SLS limit
1
Safely Limited Speed is activated with SS1 Ramp
2
Safely Limited Speed speed limit reached
3
Ramp down time
4
Delta speed limit
5
Zero speed limit, fixed value of 120 RPM
6
Cut-off speed
7
Activation of failure function set in
42-52 Fail Safe Reaction
Illustration 3.13 SLS with Ramp
Activation of failure function set in
42-52 Fail Safe Reaction
.
Parameter
Unit Range
Default
42-50 Cut Off Speed
RPM 120-10000 RPM
270 RPM
42-51 Speed Limit
RPM 1-9999 RPM
150 RPM
42-52 Fail Safe
Reaction
n/a Safe Torque Off/
Safe Stop 1
Safe Torque
Off
42-53 Start Ramp
n/a No/Yes
No
42-54 Ramp Down
Time
s
0.1-3600.0 s
1.0 s
Table 3.5 Parameters for SLS with Ramp
If the speed exceeds the limit,
42-52 Fail Safe Reaction
is
activated. The safety function can either be Safe Torque
Off or SS1 Ramp Time. SS1 can only be triggered as error
response if one digital input is selected as SS1 with ramp
time function, set in
42-40 Type
.
3.6 Inputs and Output
An internal diagnostic function in the safety option
cyclically tests the correct function of the output. A
detected fault sets the safety option into an alarm status.
At the same time, the option output S37 goes low.
Shorts between the 2 lines of a dual channel input are not
detected. Therefore the cables of the channels must be
routed separately to exclude short circuits.
NOTICE
Routing of the sensor cables
All proximity switch sensor/encoder cables must be
shielded when laid. The shielding must be connected to
chassis at both ends.
3.6.1 Inputs
The Dual-pole digital inputs are used to activate the safety
functions. DI 1 can be
•
STO: Safe Torque Off
•
SS1: Safe stop 1
•
SLS: Safely limited speed
Signals at DI 1
•
1/0 transition at the input: Activates the safety
function
•
“0” signal (0 V) at the input: Activates the safety
function
•
“1” signal (+24 V) at the input: Does not activate
the safety function
DI 2 can be
•
STO: Safe Torque Off
•
SS1: Safe stop 1
•
SLS: Safely limited speed
•
Reset: Additional safe input to reset the safety
option after an error, or after deactivating a
safety function on input DI1
Signals at DI 2
•
1/0 transition at the input: Activates the safety
function
•
“0” signal (0 V) at the input: Activates the safety
function
•
“1” signal (+24 V) at the input: Does not activate
the safety function
•
0/1 transition at the DI2 input if configured to
reset: Resets the safety option
3.6.2 Reset Input (DI2)
The reset input is for resetting the safety circuit selected
on DI1. Configure the reset input for automatic or manual
reset types. If manual reset is configured, wire the DI2A
reset input terminal to a 24 V DC via an NO switch.
Functions and System Overvi...
Operating Instructions
MG34W302
Danfoss A/S © Rev. 2014-02-11 All rights reserved.
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Summary of Contents for VLT Safety Option MCB 150
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