Chapter 6
Interfacing to the Card
6-4
Sif142FullScale (long Output, double FullScaleVolts, double MaxPwr, double
SlewRate)
Sets the source output operating parameters.
Output:
The output these parameters are for, 0 to 13.
FullScaleVolts:
Maximum voltage the output is scaled to. This is the output at
100% power. Values from -10 to +10 are valid.
MaxPwr:
Maximum power that the loop is allowed to output, expressed as
0.0 to 1.0 (representing 0% to 100%)
SlewRate:
Maximum rate of change that the output can change, expressed as
(Percent of full scale x 0.01 / Second).
Sif142Auto (long Output)
Exits manual power control and starts the control loop running on the indicated output
channel.
Output
0-11, indicating the output to place in PID control.
Sif142Loop2 (double Rate, double P, double I, double D, long Output)
Sets the control loop parameters for an output. The sensors specified in the
Sif142MapSensors function are averaged to provide the input parameters to the PID
loop.
Rate:
Specifies the rate that we wish to control to, from 0 to 999.9
Angstroms/Second.
P:
Proportional (gain) term of the PID loop. A unitless number from 0
to 9999.
I:
Integral term, from 0 to 99.9, expressed in seconds.
D:
Derivative term, from 0 to 99.9, expressed in seconds.
Output
The output (0 to 13) the parameters apply to.
Sif142SetPower (long Output, double Power)
Sets the control voltage value in manual mode. If an output was in Auto mode, turns off
PID control and places the output in Manual mode.
Output:
Specifies which output, 0 to 13.
Power:
Power is between 0.0 and 1.0, representing 0 to 100% of full scale.
