
Firmware
≤
02.00 - DMS 2.1 EN - 03/2011
L
103
8400 motec | Software Manual
Motor control (MCTRL)
Parameterisable additional functions
5.9.3.1
Manual DC-injection braking (DCB)
DC-injection braking can be manually activated via the
bSetDCBrake
process input.
For HIGH-active inputs, DC-injection braking is active as long as the signal is at HIGH
level.
After the hold time (
) has expired, the controller sets the pulse inhibit (CINH).
Tip!
• In the preset "Terminals 0" control mode, DC-injection braking can be manually
activated via the digital input DI3.
• In the preset "Terminals 11" control mode, DC-injection braking can be
manually activated via the digital input DI2.
5.9.3.2
Automatic DC-injection braking (Auto-DCB)
"Automatic DC-injection braking" (referred to in the following as "Auto-DCB") can be used
if there is a requirement that the drive be isolated from the supply at n
≈
0.
Function
For understanding the auto-DCB function, it is necessary to distinguish between three
different types of operation:
A. The drive has been enabled and, in the course of operation, the speed setpoint falls
below the Auto-DCB threshold.
– In case of operation without speed feedback, a braking current (
) is injected.
After the auto-DCB hold time (
) has expired, the motor is deenergised via the
auto-DCB function, i.e. a controller inhibit (CINH) is set.
B. When the controller is enabled, the drive is at standstill (n = 0).
If the enabled drive is to start, the speed setpoint passed via the acceleration ramp
must exceed the auto-DCB threshold (
). Below this threshold, the motor will not
be energised.
C. When the controller is enabled, the motor (still) rotates at a speed which is above the
auto DCB threshold. If the speed setpoint reached via the acceleration ramp exceeds
the auto DCB threshold (
), the motor will be energised and the drive will be
"caught".
Note!
Deactivate automatic DC-injection braking when a holding brake is used!
• For this purpose, go to
and set the Auto-DCB threshold to "0".
• Background: Controller inhibit is already activated by the
Содержание 8400 motec Series
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