Typical Application; Quick Start-Up At Default Parameter Setting; Master / Slave Control Mode - Bosch Rexroth VFC 610 Series Operating Instructions Manual

Bosch Rexroth AG
Parameter and Typical Application

9.2 Typical Application

9.2.1 Quick Start-up at Default Parameter Setting

By default, brake chopper works in standalone mode. Its default value of start
voltage is 750 V and duty cycle is 100 %.
In standalone mode, when DC-bus voltage reaches to start voltage, brake chop-
per will start braking with 100 % of duty cycle, which is irrelevant to terminals
IN and OUT of the master / slave control mode.
To meet actual requirements, start voltage and duty cycle of brake chopper can
be adjusted according to actual situations.
Brake chopper is not equipped with jumper cap or contact pin. All
parameters should be set via the panel.

9.2.2 Master / Slave Control Mode

System connection
Please refer to chapter 6.1.3 "Typical Connection Mode 2" on page
Parameter setting
When required braking power is high and singe brake chopper cannot meet re-
quirements, the way to connect multiple brake choppers in parallel (currently
support up to 3 choppers) for master/slave control is selected.
Before the brake chopper is powered on, terminals OUT of the master should be
connected to terminals IN of the slave. For example, when three brake choppers
are connected in parallel, terminals OUT of brake chopper #1 connect to termi-
nals IN of brake chopper #2, and terminals OUT of brake chopper #2 connect to
terminals IN of brake chopper #3. Ensure that the connection between master's
terminals OUT and slave's terminals IN must be correct. Otherwise the slave will
fail to work although the bus voltage reaches to brake chopper start voltage.
Parameter setting paralleled:
The braking mode of the first-level brake chopper is set as 'Master', the second-
level set as 'Master / slave', and the third-level set as 'Slave'.
For example, when three brake choppers are connected in parallel, 'H6.00' of
brake chopper #1, #2, and #3 should be set to '1', '2', and '3', respectively.
Be noticed that the braking start voltage of the slave should keep consistency
with that of the master. Otherwise, it may cause the overload or even break-
down of the brake chopper with relatively low braking start voltage.
Parameter setting:
Brake chopper #1: H6.00 = 1, H6.01 = 750, H6.02 = 100 %
Brake chopper #2: H6.00 = 2, H6.01 = 750, H6.02 = 100 %
Brake chopper #3: H6.00 = 3, H6.01 = 750, H6.02 = 100 %
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Brake Chopper
24.
DOK-RCON04-VFC*BRAKE**-IT01-EN-P