6 Applications
Bouncing switches
Please note that a bouncing switch at the digital start input may cause problems if
Immediately go to new target is permitted during a relative positioning run. The drive may
move just a little too far!
The input field Start delay is used to define a time interval that passes after the start
command for a positioning run has been issued and before the desired position is
approached.
The field Messages can be used to parameterise trigger messages that can be issued via
the fieldbus or a digital output. These trigger messages indicate the remaining distance up
to the end of a running positioning run. See also section 7.8 Digital outputs on page 172.
The field Torque feed forward can be used to increase the dynamic behaviour during the
positioning runs. This variable must be determined experimentally for the present load
case. The default setting is 0.
The checkbox Synchronised is used for the Flying saw function (see section 6.4 Flying
saw on page 108). When the "Flying saw" mode is active, the synchronisation can be
activated or deactivated by starting a position set. If the synchronisation is active, the
position of the encoder (master) that has been selected for the synchronisation is added to
the position setpoint. As a result the drive follows the position changes of the master
drive.
In most cases, the option Stop also at "Final speed" other than null should only be used for
position sequences. This means that the next position will be approached immediately
after a position has been reached. If the function mentioned above is active and a final
speed <> 0 has been parameterised, the drive will stop, provided that no follow-up
positioning has been requested.
Product manual BL 4000-C Page 89 of 298
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