Lenze 8400 motec - Manual (Page 151)

Lenze · 8400 motec · Reference manual · DMS 4.1 EN · 08/2013 · TD05 151
5 Motor control (MCTRL)
5.10 Parameterisable additional functions
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
5.10.3.1 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 (
C00107 ) 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.
5.10.3.2 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.

Note!
Deactivate automatic DC-injection braking when a holding brake is used!
• For this purpose, go to C00019 and set the auto DCB threshold to "0".
• Background: Controller inhibit is already activated by the Holding brake control .
( 268)
Up to and including version 03.xx.xx , DC-injection braking is activated immediately.
From version 04.00.00 and before DC-injection braking is activated
• and device smaller than 3 kW, it is always waited 250 ms and
• with devices bigger than 3 kW, it is always waited 1 s.
From version 05.00.00 , the waiting time before activating DC-injection braking can be
deactivated. If bit 8 is set in C00143 and the auto-DCB threshold is ≤ 5 Hz, the DC-
injection braking is activated immediately if the value falls below the threshold (without
above-mentioned waiting time).
• C00019 [rpm] = auto DCB threshold [Hz] * 60 / number of pole pairs