Instruction Manual PSx3xxEC
33
2) Now start the reference run as manual run (set bit 0 or 1 and the release bit in
the control word).
3) Wait for the drive moving (bit 6 in the status word is set).
4) Wait for the drive has stopped and a positioning error has appeared (bit 6 in the
status word is cleared, bit 10 is set).
5) Start a manual run in the opposite direction with the same settings (move a
certain distance away from the hard stop in order the drive can move freely).
6) Only now adjust the desired settings of the adove mentioned SDOs for normal
operation.
4.14
Reverse drive
In vertical positioning with spherical roller spindles, pitches of approx. 4..10 mm and
weights from 100 kg, it is possible that the PSx3xx does not consume any energy
from the motor supply when travelling downwards, but rather generates some. This
regenerative operation is permissible under certain conditions. The energy generated
is fed back into the motor supply network via the internal regenerative circuit and
must be drawn off there. The PSx3xx increases the voltage in the motor supply
network until the additional energy is drawn off. However, the internal protection diode
limits this voltage to max. 31 VDC.
The following cases should be considered:
1) If several PSx3xx and/or other loads are connected to the same power supply,
regeneration is possible without any additional measures if several PSx3xx do not
generate power simultaneously. The other devices then act as consumers of the
energy generated by a PSx3xx.
2) If several PSx3xx are to use the regenerative circuit simultaneously, an
overvoltage protection must be provided in the motor supply network.
If a PSx3xx is operated for more than 1-2 seconds in regenerative mode without
consumer of the generated energy, this damages the internal protection diode
and the PSx3xx is defective.
