6 mode 22: automatic dc-injection braking, Mode 22: automatic dc-injection braking, 12 basic drive functions – Lenze E94AxPExxxx User Manual
Page 576: Danger
12
Basic drive functions
12.12
Brake control
576
Lenze · 9400 Servo PLC· Reference manual · DMS 4.0 EN · 11/2013 · TD05/06
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12.12.6
Mode 22: Automatic DC-injection braking
If mode 22 has been selected in
, DC-injection braking is executed automatically if the
current speed setpoint falls below the speed threshold set in
• The automatic is only effective in the function states "Drive is stopped", "Drive at standstill",
"Quick stop active", and "Fault".
• DC-injection braking is executed for the brake closing time set in
with the braking
current set in
.
• After the brake closing time has elapsed, the controller inhibit is set automatically by the basic
function "brake control".
[12-42] Example 1: Speed follower active stopping active (stopping time > brake closing time) speed follower active
Note!
Automatic DC-injection braking is only possible if V/f control or sensorless vector control
is selected as motor control type in
Danger!
If the braking current is set too low, or the application time is too short, controller inhibit
is set and the drive becomes torqueless before being completely braked to standstill by
means of DC-injection braking!
: Brake activation threshold
: Brake closing time
t
t
Enable speed follower
t
Speed setpoint
Speed follower active
Stopping active
DC brake active
t
t
CINH