Lenze 4800 Manual page 140

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Configuration
lead to phase errors occur.The direction changeover can, for instance, be used
for electrical shafts, consisting of 2 opposite motors.
Special features compared to speed control
( No set-value integrator in the set-value branch.
( A changeover to a JOG value is not possible.
( The additional set-value is not active.
Feedback system (X7)
With configuration C005 = -72- only the resolver can be selected as feedback
system.
QSP at the slave
If QSP is switched at the slave, the set-value (C050) is reduced along the QSP
ramp. Homing points are lost. A driftfree standstill is obtained because with the
switching of QSP the set phase is led by the QSP integrator.
If the deceleration ramp is very short and it can only be achieved with I the
max
set-value integrator follows the actual phase integrator. Thus, the rotor does not
turn back when reaching n = 0.If the I message is reset, the phase control will
max
be reactivated and drift-free standstill can be ensured.
At the DF output, the set-value for the following slave(s) is still output.
Ctrl. enable at the slave
If a slave is inhibited, the motor coasts at the friction torque. At the digital
frequency output, the set-value for the following slave is still output. If the slave
is enabled, the drive accelerates to its set-value (possibly at the current limit).
When the controller is enabled, the phase difference is set to zero. Homing points
are lost.
Exception
If the controller is inhibited because of a short-term synchronisation fault or mains
undervoltage, the phase difference will not be reset. After mains recovery, the
drive is able to follow its set phase. A phase difference, detected before, will be
compensated.
48XX/49XXSHB0399
7-49