7
Operating modes
192
Festo – GDCP-CMMP-M3/-M0-C-CO-EN – 1510b – English
In Fig. 7.6, 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 position
ing. In this way, positioning tasks follow each other seamlessly. For this operating mode, the object
end_velocity should be written over 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.
Time
t
0
v
2
v
1
t
1
t
2
Velocity
Fig. 7.6
Continuous sequence of positioning tasks
If besides the bit new_set_pointthe 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.