11.3.2 Behavior in the case of transition 5 (disable operation)
The behavior in transition 5 from “Operation enabled” to “Switched On” can be con-
figured via parameter State transition 5 392.
0
Immediate transition from “Operation enabled” to
“Switched On”, drive coasts to a standstill
1
Activation of DC brake, at the end of DC deceleration,
there is the change from “Operation enabled” to
2
Transition with normal ramp, when the drive has come to
a standstill, there is the change from “Operation enabled”
Setting 1 “Direct current brake” is only possible with applications with U/f characteris-
tic control (e.g. configuration 110). Other configurations do not support this operation
mode.
If the frequency inverter is operated with a configuration which does not support the
operation mode Direct Current Brake (e.g. configuration 210, field-
value "1" cannot be used.
In this case, the operation mode is not offered in the selection menus of the control
unit KP500 and the control software VPlus.
By default, State-transition 5 392 is set to operation mode “2 - Ramp” For configura-
tions with torque control, the default value is “0 – coast to stop”.
If the configuration is changed, the value set for State-transition 5 392
is also
changed, if necessary.
The behavior in transition 5 is only relevant for configurations without Motion Control
(parameter Configuration 30 ≠ x40).
If State-transition 5 392 was triggered with “1 - DC brake”, a new control word will
only be accepted after completion of the transition process. The change of state from
“Operation enabled” to “Started” is done after the Braking time 632
parameterized
for the DC brake has elapsed.
If parameter State-transition 5 392 = “2 - Ramp” is set, the control word can be set
to “Operation enabled” again, while the drive is decelerating. In this way, the drive
accelerates to its set reference value again and remains in the state “operation en
The change of state from “Operation enabled” to “Switched On” is done after the val-
ue has dropped below the set Switch-Off Threshold
and the set holding time has
elapsed (equivalent to the behavior in the case of a quick stop). In this context, p
rameters Switch-Off Threshold stop function 637 (percentage of parameter Max
mum Frequency 419) and Holding time 638 (Holding time after pass
ing of threshold)
are relevant.
10/13
ACU
Modbus/TCP 73