Leuze BPS 300i - Timing; Leuze Webconfig Tool; Evaluation of the Read Quality; Distance Measurement to the Bar Code Tape

Functions
Leuze electronic BPS 300i 27
4.3 Timing
The BPS of the 300i series operate with a scanning rate of 1000 scans per second. A measurement value
is ascertained every 1 ms.
The following parameters are relevant for the timing of the position and velocity measurement:
4.4 Leuze webConfig tool
The webConfig configuration tool offers a graphical user interface for the display of process data, config-
uration and diagnostics of the BPS via a PC; see chapter 9 "Leuze electronic webConfig tool – Extended
configuration".
4.5 Evaluation of the read quality
The BPS can signal the read quality of the BPS. The read quality is displayed in % values.
The evaluation of the read quality provides the following information, e.g.:
• The read quality is constantly bad: Soiling of the BPS optics
• The read quality is always bad at certain position values: Soiling of the BCB
4.6 Distance measurement to the bar code tape
Within the reading field, the BPS can output the current distance from the read head to the BCB. The
distance from the position label closest to the reference point is output.
Parameters Description Range/Values
Velocity resolution The parameter defines the resolution of the velocity value. It
affects only the fieldbus output.
1 mm/s
10 mm/s
100 mm/s
1000 mm/s
or
Free resolution
Averaging The parameter specifies the averaging time of the calculated
velocity values in steps.
Steps:
2 ms, 4 ms, 8 ms,
16 ms, 32 ms,
64 ms, 128 ms
Parameters Description Range/Values
Integration depth The integration depth affects the measurement of position and
velocity. The integration depth parameter specifies the number
of sequential measurements that the BPS uses for position
determination.
The integration results in smoothing of the output measure-
ment value.
With the BPS 300i, an
integration depth of 8 yields an integra-
tion time of 8 ms.
Factory setting:
8
Error delay time Errors that occur are suppressed for the configured time.
If no valid position or velocity value can be ascertained in the
configured error delay time , the last valid value is always out-
put.
If the error persists after the error delay time elapses, the value
of the Position / Velocity value in case of error parameter is
then output (standard).
Factory setting:
50 ms
The values of the read quality are displayed via the optional display ( Quality ), the serial commu-
nication protocol and via the webConfig tool; see chapter 9.3.3 "ALIGNMENT function".