Lenze i510 - Holding Brake Control

10.10 Holding brake control
This funcon is used for low-wear control of a holding brake.
Precondions
•
Ob
ser
v
e tha
t the holding br
ake is an important element of the machine's safety concept as
a whole. Therefore be sure to carry out commissioning of this system part with parcular
care!
•
Holding brakes on Lenze motor
s are not intended for braking during operaon. The
increased wear caused by braking during operaon may destroy the holding brake prema-
turely!
•
Ensure that the inverter builds up a sucient torque in the motor when releasing and
applying the holding brake, in order to hold the load. For this purpose, a voltage boost can
for instance be set for the V/f characterisc control. 4Voltage boost ^ 84
•
If the holding brake is to be controlled via a digital output, the use of an addional relay or
power contactor is required. The digital output is not suited for direct control of a holding
brake.
•
When a power contactor is used, the response me and release me of the contactor is
added to the engagement and disengagement me of the holding brake. Both mes must
also be taken into consideraon for parameterising the engagement and disengagement
me of the holding brake.
•
If, instead of an electrically releasing (self-holding) holding brake, an electrically holding
(self-releasing) holding brake is to be controlled, a signal inversion for the digital output
used or for the relay is to be set! 4Conguraon of digital outputs^ 215
•
If a switch-on delay is required, it has to be set for the digital output used or for the relay!
4Conguraon of digital outputs ^ 215
Details
Holding brakes are used for locking axes with controller inhibit or pulse inhibit, or if the sys-
tem is in the "mains o" stat
e. This is not only important for vercal axes but, for instance,
also for horizontal axes which may cause various problems with uncontrolled movements.
Examples:
•
Loss of the reference informaon aer mains OFF and further spinning of the drive.
•
Collision with other moving machine parts.
The holding brake can either be released automacally when the controller is enabled or
manually via a control signal. The holding brake control itself only outputs a digital trigger for
releasing the holding brake. This trigger can be assigned to a digital output or, in the easiest
case, to the relay which then switches the brake supply.
Parameter Name / value range / [default seng] Info
0x2820:001
(PAR 712/001)
Holding brake con
trol: Operang mode
(Mech. brake: MB operang mode)
Selecon of the operang mode for the holding brake control.
0 Automacally (via device state) The "Release holding brake" command is eected automacally when
the inverter is in the "Controller enable" state.
1 Manually The "Release holding brake" command is acvated by an external trig-
ger:
•
Via bit 14 in the CiA402 control word 0x6040.
•
Via the trigger assigned in 0x2631:049 (PAR 400/049) of the "Release
holding brake" funcon.
2 No braking funcon During normal operaon, brakes are neither controlled, nor detected,
nor monitored.
0x2820:002
(PAR 712/002)
Holding brake control: Engagement me
(Mech. brake: Engagement me)
0 ... [100] ... 10000 ms
Engagement me (applicaon me) of the holding brake.
0x2820:003
(PAR 712/003)
Holding brake control: Disengagement me
(Mech. brake: Disengagem. me)
0 ... [100] ... 10000 ms
Disengagement me (release me) of the holding brake.
Addional funcons
Holding brake con
trol
180
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