Inputs And Output; Inputs; Reset Input (Di2) - Danfoss VLT MCB 150 Operating Instructions Manual

Functions and System Overvi...
B
A
4
6
5
1 2
3
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
42-50 Cut Off Speed RPM 120-10000 RPM
42-51 Speed Limit RPM 1-9999 RPM
42-52 Fail Safe n/a Safe Torque Off/
Reaction Safe Stop 1
42-53 Start Ramp n/a No/Yes
42-54 Ramp Down s 0.1-3600.0 s
Time
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.
MG34W302
Operating Instructions
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
7
shielded when laid. The shielding must be connected to
chassis at both ends.
4

3.6.1 Inputs

The Dual-pole digital inputs are used to activate the safety
functions. DI 1 can be
time
Signals at DI 1
DI 2 can be
Default
270 RPM
150 RPM
Safe Torque
Off
Signals at DI 2
No
1.0 s

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.
Danfoss A/S © Rev. 2014-02-11 All rights reserved.
•
STO: Safe Torque Off
•
SS1: Safe stop 1
•
SLS: Safely limited speed
•
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
•
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
•
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
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