Lenze E94AxPExxxx - Manual (Page 551)

Lenze · 9400 Servo PLC· Reference manual · DMS 4.0 EN · 11/2013 · TD05/06
551
12 Basic drive functions
12.12 Brake control
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12.12 Brake control
This basic function is used for a wear free control and monitoring of a motor holding brake which in
the simplest case is connected to the optionally available motor brake control module.
Alternatively, the motor holding brake can be controlled via a digital output and monitored via a
digital input.
Intended use
Motor holding brakes are used to hold axes in the case of controller inhibit or pulse inhibit and in
the "Mains OFF" system state. This is not only important for vertical axes, but for instance also for
horizontal axes for which an uncontrolled movement can bring about diverse problems.
Examples:
• Loss of the reference information after mains OFF and further spinning of the drive.
• Collision with other moving machine parts.

Danger!
Please bear in mind that the motor holding brake is an important element of the safety
concept of the entire machine. Thus maintain this system component with special care!

Stop!
Motor holding brakes at Lenze motors are not designed for braking during operation.
The increased wear resulting from braking during operation may lead to an early
destruction of the motor holding brake!

Please observe the notes in the hardware manual for mounting and electrical
installation of the motor holding brake!

Note!
For the operation with the motor brake control module:
• For single-axis controllers (Single Drive) the control (release) of the motor holding
brake is only possible if both the DC-bus voltage and a 24-V supply voltage are
available for the motor brake control!
• For multi-axis controllers (Multi Drive) the motor holding brake can also be released
without a DC-bus voltage.
The following applies to the encoderless motor control types :
The operation of vertical drives/hoists is
• only supported up to 55 kW by the V/f control!
• not supported by the sensorless vector control!
When the V/f control or sensorless vector control are selected, standstill monitoring is
always switched off.