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t3:
Only then can the "Start" flag be deactivated, since the measurement starts after that (this only
applies to untriggered measurements; with triggered measurements, "Start Acknowledge" can be
acknowledged directly by deactivating "Start").
t4:
Once "Start" has been deactivated again, "Start Acknowledge" is deactivated and "Measurement
Running" set.
t5:
Once "Start Acknowledge" has been deactivated again, this means that the measuring parameters have
been imported; they can then be modified as desired (e.g. in preparation for the next measurement).
t6:
Once the actual measurement has come to an end, "Measurement Running" and "Ready" are
deactivated. From this point on, the laster pulse "Laser On" can be switched off, since it will not be
needed for subsequent calculations.
t7:
Once calculations have been completed (or a fatal failure has occurred), the flags are set to "Finished"
and "Idle".
If the "Measurement Failure" flag is activated, a fatal error has occurred and the measurement or
calculation has been disrupted. The cause of the failure is coded in the "Error Identified" log.
If "Measurement Failure" is not set, the measurement and calculation has been successfully performed
and the results can be found in the "Beam Parameter" results log. The maximum value of the raw data
and an indication of how many pixels were overloaded is coded in the high byte of the status value.
It is possible that the "Irradiation Failure" flag has been set; in that case, a non-fatal failure has occurred
(measurement overloaded or underloaded, beam on the edge of the measurement window). The cause
is coded in the "Warning Identifier" log. Beam parameters have been determined, however, and these
are available in the results registers.
t8:
Results as well as failure flags and identifiers are maintained until the next measurement is initiated
by "Start".
t9:
With a triggered measurement, the measuring process is initiated once "Start" is deactivated and
continues until the point at which the device is ready to measure and is waiting to be triggered (laser
detected).
t10:
"Ready" is then set to show that the laser should now be switched on, "Laser On". The laser pulse
shouldn't have been triggered in advance, since in that case it could be gone by the time the device
is ready to measure!
t11:
In this case as well, "Measurement" and "Ready" are deactivated after the end of the actual
measurement. From that point on, the laser pulse "Laser On" can be switched off.
68
FocusParameterMonitor FPM
Revision 06 EN 02/2023
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