ABB PFEA 113 User Manual page 76

Tension Electronics PFEA113, User Manual
Chapter 3 Commissioning
3-44
Default Scaling
Load Cell Combination, LoadCellComb: One or two rolls
SW 1.0-1.7 differs slightly from SW1.8 and later. The difference signal in SW1.0-1.7 has a
different scaling factor as illustrated in
measurement object have the same scaling. When replacing an older unit with an SW1.8 or later
-unit the load scaling for difference signals must be adjusted in the Profibus master.
Load Cell Combination, LoadCellComb: Segmented roll
As Table 3-6 illustrates the load scaling must be adjusted in the Profibus master when replacing
an old unit with SW1.8 or later -unit.. In the case of 9-12 load cells the scaling is the same for all
Number of load cells connected
to the analog output channel
One or Two rolls
• 1 or 2 load cells
• Difference signal
Segmented roll
• 3 load cells
• 4 load cells
• 5 to 8 load cells
(1 to 4 load cells + AI1)
• 9 to 12 load cells
(1 to 4 load cells + AI1 + AI2)
• Difference signal
SW.
Table 3-6. Scaling of Profibus Measurement Values
Example for 1 kN load cells (SW1.8):
With 1 kN load cells, and with AI1+A+B (AI1 + 2 load cells) connected to the AO 1, the value
of the least significant bit is:
 
0.001 12 1000 = 12 N
Measuring range: 60 000 N
Table 3-6. In SW1.8 or later, all signals for each
Value of least significant bit,
Load Division (Resolution)
(F = Load cell nominal load)
nom
SW 1.0-1.7
 
0.001 2 F
nom

0.001 F
nom
 
0.001 3 F
nom
 
0.001 4 F
nom
 
0.001 8 F
nom
 
0.001 12 F
nom

0.001 F
nom
SW1.8 and later
 
0.001 2 F
nom
 
0.001 2 F
nom
 
0.001 12 F
nom
 
0.001 12 F
nom
 
0.001 12 F
nom
 
0.001 12 F
nom
 
0.001 12 F
nom
3BSE029382R0101 Rev C