Group Group
name
Parameter Value range/
available op-
tions
Default Description Con-
ver-
sion
index
Data
type
42-2* Safe In-
put
42-20 Safe
Function
[0] STO [0] STO This can be 1 of the safety functions or
disabled. Remark: Both Safe Inputs can
NOT be disabled at the same time.
– u_int8
[1] SS1-a
[2] SS1-b
[3] SLS-a
[4] SLS-b
[5] disable
42-21 Type [0] NCNC [0] NCNC NCNC, antivalent (NC/NO) or 1NC. – u_int8
[1] Antivalent
[2] NC
42-22 Dis-
crepancy
Time
0–5000 ms 10 ms An adjustable filter time prevents
faults caused by temporary discrepan-
cy.
-3 u_int16
42-23 Sta-
ble Signal
Time
0–5000 ms 10 ms An adjustable signal filter in the safety
option suppresses temporary signal
changes using test pulse pattern.
-3 u_int16
42-24 Re-
start Be-
havior
[0] Manual [0] Manual In case of an activated safety function,
the safety option can either restart au-
tomatically or wait for a RESET signal
from the user.
– u_int8
[1] Automatic
42-3* General 42-30 Ex-
ternal Fail-
ure Reac-
tion
[0] STO [0] STO Safety function that is executed if there
is an external failure.
– u_int8
[1] SS1-a
[2] SS1-b
42-31 Re-
set Source
[0] Drive Reset [0] Drive Re-
set
Source for the RESET of the safety op-
tion. Can either be executed on the op-
tion input DI2, via fieldbus or digital in-
put on the drive or via the LCP. By se-
lecting Drive Safe Reset, only the safety
option is reset.
– u_int8
[1] Drive Safe
Reset
[2] Safe Option
DI1_A
42-33 Pa-
rameter
Set Name
Visible String,
length: 8
SafeSet1 Name of the safe parameter Set (must
be 8 characters to avoid a bad customi-
zation data error).
General Parameter Set-up
Installation Guide | VLT® Safety Option MCB 150/151
AQ279747441421en-000101 / 130R0292
64 | Danfoss A/S © 2018.09