Lenze 8400 User Manual

8 Basic drive functions (MCK)
8.12 Holding brake control
606
Lenze · 8400 HighLine · Reference manual · DMS 12.0 EN · 06/2017 · TD23
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8.12.1 Internal interfaces
In the function block editor, the LS_MotionControlKernel system block provides the following
internal interfaces for the basic function "holding brake control":
Inputs
Designator
Data type
Information/possible settings
bMBrakeRelease
BOOL
Releasing/applying the brake in connection with the selected operating mode
FALSE Apply brake.
• During automatic operation, the internal brake logic controls the
brake.
TRUE Release brake manually (forced release).
• Note!
The brake can also be released when the controller is inhibited!
• During automatic operation, the internal brake logic is
deactivated and the brake is released (supervisor operation). If a
controller inhibit has been set by the brake control, it will be
deactivated.
• In semi-automatic operation, the brake is released including
feedforward control.
bMBrakeStartValue2
BOOL
(from version 06.00.00)
Selection of the torque feedforward control value
Feedforward control of the motor before release
FALSE Starting value 1 is active (see the following figure).
TRUE Starting value 2 is active (see the following figure).
Creation of the feedforward control value for the release process of the brake:
 Signal path for motor control with
feedback
 Signal path for motor control without
feedback
 Feedforward control value
 C02581/1
: Switching threshold
 C02581/2
: Hysteresis for release
 C02581/3
: Hysteresis for application
 C02581/4
: Starting value 1 for manual feedforward control
 C02581/5
: Starting value 2 for manual feedforward control
 C02582/Bit 4
: Selection of the feedforward control value (automatic/manual
selection)
nMBrakeAddValue_a
INT
(from version 06.00.00)
Additive feedforward control value (speed or torque) in [%] for torque feedforward
control when the respective control mode is started
• For speed control: 100 % ≡ reference speed (C00011
)
• For torque control: 100 % ≡ maximum torque (C00057
)
Feedforward control of the motor before release
0
t


nSpeedSetValue_a

Release brake
Close brake
bBrakeStartValue2
TorqueValue2
(+)nSetSpeed
(-)nSetSpeed
C02581/4
C02581/5
0
2
TorqueValue1
C02582 - Bit 4
nBrkAddValue_a
nMotorTorqueAct_a
T=4ms
S&H (Retain)



1
0
0
1
1

Lenze 8400 Specifications

General

Category	DC Drives
Series	8400
Protection class	IP20
Control Type	Vector control
Communication	CANopen, PROFIBUS, Ethernet
Protection Features	Overcurrent, overvoltage, undervoltage, overtemperature
Input Voltage	AC 230/400/480 V