Siemens MICROMASTER 420 Operating Instructions Manual page 116

3 Functions
OFF2
The inverter pulses are immediately cancelled by the OFF2 command. This means
that the motor coasts-down and it is not possible to brake in a controlled fashion.
Fig. 3-45
NOTE
The OFF2 command can have one or several sources. The command sources
are defined using BICO parameters P0844 (BI: 1. OFF2) and P0845 (BI: 2.
OFF2).
As a result of the pre-assignment (default setting), the OFF2 command is set to
the BOP. This source is still available even if another command source is
defined (e.g. terminal as command source
using DIN2
OFF3
The braking characteristics of OFF3 are identical with those of OFF1 with the
exception of the autonomous OFF3 ramp-down time P1135. If the output frequency
falls below parameter value P2167 and if the time in P2168 has expired, then the
inverter pulses are cancelled as for the OFF1 command.
P1082
P2167
r0052 Bit02
Operation
cancellation
Fig. 3-46
NOTE
OFF3 can be entered using a wide range of command sources via BICO
parameters P0848 (BI: 1. OFF3) and P0849 (BI: 2. OFF3).
116
f
act
P1082
f
max
r0052 Bit02
Operation
Pulse
cancellation
OFF2
P0702 = 3).
f
act
f
max
OFF3
P2168
t
down,OFF3
P1135
Pulse
OFF3
OFF2
P0700 = 2 and OFF2 is selected
t
t
down , OFF 3
t
MICROMASTER 420
Issue 07/04
t
t
f
2
P1135
P1082
Operating Instructions
6SE6400-5AA00-0BP0