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BEST Central Unit Overview
BEST
User’s Manual
22
3. BEST Central Unit Overview
3.1 Controller Schematic
Figure 15
provides a schematic representation of all the functional blocks
implemented in the Central Unit.
The first operation carried out by the Central Unit is to convert the currents readouts
provided by the
TetrAMMs
in position (X, Y) and intensity (I
0
).
Before entering the PIDs, the position (X, Y) and intensity (I0) are sent to the BPM
selector block. This block allows the user to select which BPM should be assigned to
which PID controller.
An averaging module is placed in between the
BPM selector and the PID. This
module, configurable by the user, defines the update frequency (sampling frequency)
of the PID controller. The PID controller can work up to 100 kHz, which correspond
to no average (or average of 1 sample) on the positions samples. Typical update
frequencies are 10-100Hz or even lower for slow mechanics.
Finally, the PIDs outputs go in the output selector block which can be configured by
the user to assign each PID output to the desired PreDAC channel.
More detailed information regarding the configuration of each block can be found in
chapter 4.