8. Operating modes
174
Festo P.BE-CMMP-CO-SW-EN 0708NH
In Fig. 8.19, a new positioning task is already started while the previous one is still in
process. The host already passes the subsequent target on to the motor controller when
the motor controller signals with deletion of the bit
set_point_acknowledge
that it has
read the buffer and started the related positioning. In this way, positioning tasks follow
each other seamlessly. For this operating mode, the object
end_velocity
should be written
with the same value as the object
profile_velocity
so that the motor controller does not
briefly brake to zero each time between the individual positioning tasks.
Fig. 8.19: Continuous sequence of positioning tasks
If besides the bit
new_set_point
the bit
change_set_immediately
is also set to "1" in the
controlword
, the host instructs the motor controller to start the new positioning task
immediately. In this case, a positioning task already in process is interrupted.
8.4
Interpolated position mode
8.4.1
Overview
The interpolated position mode (
IP
) permits specification of nominal position values in a -
multi-axis use of the motor controller. To do this, synchronisation telegrams (SYNC) and
nominal position values are specified by a higher-level controller in a fixed time grid -
(synchronisation interval). Since the interval is normally greater than one position
controller cycle, the motor controller independently interpolates the data values between
two specified position values, as shown in the following diagram.
Содержание CMMP Series
Страница 2: ......