But number Bit name Value Function
04 Blank initial state 0 Safety option is configured
1 Safety option is in blank initial state
05–31 Reserved for future use
6.3 Parameter List
Table 14: Safety Option Parameters
Group Group
name
Parameter Value range/
available op-
tions
Default Description Con-
ver-
sion
index
Data
type
42-1* Speed
Moni-
toring
42-10
Measure
Speed
Source
[0] None [1] Safe Op-
tion
The source of the speed feedback. 1 u_int8
[1] Safe Option
42-11 En-
coder Res-
olution
1–4096 PPR (for
option with
HTL encoder)
1024 PPR Encoder or proximity switch resolution
of the encoder connected to the MCB
150 TTL and MCB 151 HTL.
0 u_int16
1–10000 PPR
(for option with
TTL encoder)
42-12 En-
coder Di-
rection
[0] Clockwise [0] Clock-
wise
Allows for changing the detected en-
coder rotation direction without
changing the wiring to the encoder.
– u_int8
[1] Counter
clockwise
42-13 Gear
Ratio
0.0001–32.0000 1 Ratio between motor speed and en-
coder speed. Remark: Only used when
gear mounted.
-4 u_int32
42-14
Feedback
Type
[0] With direc-
tion info
[0] With di-
rection info
The feedback can be with or without
direction information. For TTL/HTL en-
coder, direction info is available. For
proximity switch, select [1] Without Di-
rection Info.
– u_int9
[1] Without di-
rection info
42-15
Feedback
Filter
0.01–200.00 Hz 200 Hz Frequency of the feedback filter. De-
fault value is 200 Hz (off) if the encoder
resolution is higher than 150 PPR. A fil-
ter value of 200 Hz is selected, mean-
ing that the filter is off. The use of fil-
ters depends on the given encoder res-
olution, gear ratio, and feedback type.
-2 u_int16
42-18 Zero
Speed Tim-
er
0–10000 h 8760 h Time period where the option is al-
lowed to be below 120 RPM when SLS
is active before STO is activated.
74 u_int16
42-19 Zero
Speed Lim-
it
Fixed 120 RPM 67 u_int16
General Parameter Set-up
Installation Guide | VLT® Safety Option MCB 150/151
AQ279747441421en-000101 / 130R0292 | 63
Danfoss A/S © 2018.09
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