Off/Braking Functions - Siemens MICROMASTER 440 Operating Instructions Manual

3 Functions
3.12.3

OFF/braking functions

Parameter range:
Warnings
Faults
Function chart number:
The drive inverter and the user must respond to an extremely wide range of
situations and stop the drive. In this case, both requirements relating to operations
as well as drive inverter protective functions (e.g. electrical and thermal overload)
and man-machine protective functions have to be taken into account. As a result of
the different OFF/braking functions (OFF1, OFF2, OFF3) MICROMASTER can
flexibly respond to the requirements mentioned above.
OFF1
The OFF1 command is closely coupled to the ON command. When the ON
command is withdrawn, then OFF1 is directly activated. The drive is braked by
OFF1 with the ramp-down time P1121. If the output frequency falls below the
parameter value P2167 and if the time in P2168 has expired, then the inverter
pulses are cancelled.
P1082
P2167
r0052 Bit02
Operation
Pulse
ncellation
Fig. 3-64
186
P1121, P1135, P2167, P2168
P0840 – P0849
r0052 bit 02
-
-
-
f
act
f
max
OFF1
f
2
P2168
t
down,AUS1
P1121
OFF1
t
=
P1121
t
down , AUS 1
t
MICROMASTER 440 Operating Instructions
6SE6400-5AW00-0BP0
Issue 10/06
f
2
⋅
P1082