SERVOSTAR™ 300

Technical description 07/2010 Kollmorgen
6.4 LED display
A 3-character LED display indicates the status of the amplifier after switching on the 24V
supply (� p.99). When the keys on the front panel are used, the parameter and function
numbers are shown, as well as the numbers for any errors that may occur (� p.100).
6.5 Grounding system
AGND — analog inputs, internal analog ground, encoder emulation, RS232, CAN
DGND — digital inputs/outputs and the 24V supply, optically isolated.
6.6 Dynamic braking (brake circuit)
During dynamic braking with the aid of the motor, energy is fed back into the servo amplifier.
This regenerative energy is dissipated as heat in the brake resistor. The brake resistor
is switched in by the brake circuit.
The setup software can be used to adapt the brake circuit (thresholds) according to the
electrical supply voltage.
Our customer service can help you with the calculation of the brake power that is necessary
for your system. A simple method is described in the "Product Wiki" which is accessible
at www.wiki-kollmorgen.eu.
A description of the interface can be found on page 59.
Functional description:
1.- Individual amplifiers, not coupled through the DC bus link circuit (DC+, DC-)
When the energy fed back from the motor has an average or peak power that exceeds
the preset level for the brake power rating, then the servo amplifier generates the warning
“n02 brake power exceeded” and the brake circuit is switched off.
The next internal check of the DC bus link voltage (after a few milliseconds) detects an
overvoltage and the output stage is switched off, with the error message “Overvoltage
F02” (� p.100).
The BTB/RTO contact (terminals X3/2,3) will be opened at the same time (�p.82)
2.- Several servo amplifiers coupled through the DC bus link (DC+, DC-)
Using the built-in brake circuit, several amplifiers (even with different current ratings) can
be operated off a common DC bus link, without requiring any additional measures.
The combined (peak and continuous) power of all amplifiers is always available. The
switch-off on overvoltage takes place as described under 1. (above) for the amplifier that
has the lowest switch-off threshold (resulting from tolerances).
Technical data of the brake circuits dependent on the amplifiers type and the mains voltage
situation see table on the next page.
28 SERVOSTAR 300 Instructions Manual