Multispan - Siemens Milltronics BW500 Operating Instructions Manual

7.4.8

Multispan

The BW500 offers a multispan function, which allows the BW500 to be calibrated for up to eight
different feed conditions that would produce varying load characteristics. Different feed
conditions are typically related to the running of different materials or multiple feed locations. The
varying load characteristic often has a bearing on the belt tension, and is observed especially
when in close proximity to the scale. To accommodate such scale applications, a span
correction can be made by selecting and applying the appropriate span.
Since every material has its own unique physical properties, and may load the belt differently, a
span calibration may be required for each material to realize maximum accuracy.
In the case of different feeder locations, a span calibration may be required to match each
feedpoint or combination of feedpoints.
Each time one of the eight conditions is in effect, the corresponding multispan is selected prior to
putting the BW500 into the RUN mode. The selection is made by either changing the multispan
operation number, accessed via P365, or by external contacts connected to the Auxiliary input,
and programmed via P270.
To enable multispan operation, the following must be addressed.
● connections
● programming
● calibration
● operation
Note
Multispan is not available with BW500/L.
BW500 and BW500/L
Operating Instructions, 12/2016, A5E33482052-AD
Recalibration
7.4 Recalibration
81