Parame‐
ter
Options/
valid range
De‐
fault
value
Description
Con‐
ver‐
sion
index
Data
type
42-22
Discrep-
ancy
Time
0–5000 ms
10 ms
Enter the maximum time in ms allowed for differences between input
channels. This parameter helps to prevent errors caused by temporary
discrepancy.
-3
u_int16
42-23
Stable
Signal
Time
0–5000 ms
10 ms
Enter the stable signal time in ms. The stable signal time is the period
where the VLT® Safety Option MCB 152 suppresses temporary signal
changes at its safety inputs. This functionality prevents the MCB 152
from reacting to short test pulses from external modules or sensors.
-3
u_int16
42-24 Re-
start Be-
havior
[0] Manual
[1] Automatic
[0]
Manual
Select whether the safety option restarts automatically or waits for a
manual reset after the safety function was activated via a digital input.
[0] Manual
- when the safety function is activated via a safe input, the
safety option requires a reset from a reset source before it can run
again.
[1] Automatic
- when the safety function is activated, the safety
option can run again when the condition that triggered the safety
function ceases.
–
u_int8
7.2.2 Parameter Group 42-3* General
Table 10: 42-3* General
Parameter
Options/valid
range
Default
value
Description
Con‐
ver‐
sion
index
Data
type
42-30 Exter-
nal Failure
Reaction
[0] STO
[0] STO
Select a safety function that is executed if an external error oc-
curs.
–
u_int8
Parameter Setup
Installation Guide | VLT®Safety Option MCB 152
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Danfoss A/S © 2020.02
Summary of Contents for MCB 152
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