Description
General Information Product ID:3BSE050092R65 ABB Type Designation:PFEA113-65 Catalog Description:Tension Electronics PFEA113-65 Country of Origin:Sweden (SE) Product Net Weight:6 kg Technical Information: Insulation amplifier connected to AO1, voltage output. 4 load cells input, 6 AO selectable V/C, 4 DO, 1 DI, 2 AI. Display show Sum, Diff and individual. Profibus-DP. Incl. a CD user manual
Profibus Measuring Range Profibus Measuring Range (estimated web tension during normal operation) is a parameterentered by the user. After the user has changed the Measuring Range value, changing Load cellnominal load does not affect the Profibus scaling. The value of the least significant bit is definedas Load Division Load Division Load Division is the resolution that will be used on Profibus. The Load Division value iscalculated by PFEA113 and depends on the set measuring range. The measuring range is divided into a limited number of divisions in the range 2001 - 5000. The Load Division value = one division, contains only one significant digit (1, 2 or 5).The Profibus can handle max. –32768 to +32767 (216) divisions Example 1: a. Profibus Measuring Range (set by user) = 15 500 N(estimated web tension during normal operation) b. Load Division calculated by PFEA113 = 5 N(value of least significant bit on Profibus) c. Profibus Measuring Range/Load Division = 15500/5 = 3100(the measuring range is divided into 3100 divisions)
Example 2:
If the Load Division, 5 N, in Example 1 is not sufficient, the Load Division can be adjusted.This can be done by setting (decreasing) MeasuringRange in the Miscellaneous Menu to avalue that gives a sufficient Load Division (resolution).
a. Measuring Range = 9000 N(New, lower setting on measuring range)
b. New Load Division calculated by PFEA113 = 2 N(New value of least significant bit on Profibus)
With the setting 9000 N in PFEA113 , the Profibus measuring range 0 – 15500 N (divided into7750 divisions) can still be used, now with the Load Division (resolution) 2 N.
Normally, there is no need to set the measuring range lower than 1/3 of the estimated webtension during normal operation.The max. value that can be transmitted via Profibus, for a given Load Division, is:
– Max. value = Load Division x 32767
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