BEST
User’s Manual
EPICS
47
5.4
Controlling
the
PreDAC
output
in
Closed Loop:
The closed loop configuration is the default configuration where the feedback
controller implemented in FPGA logic performs all the calculations in order to get the
X/Y positions or intensity to the user defined setpoint.
The user must firstly ensure that the
PreDAC
output is driven by hardware (i.e.
FPGA) and not by software (i.e. through the PCIe):
Now the feedback controller can be enabled:
And finally it is possible to control the position in closed loop: