ABB PFEA 113 - Page 76

Tension Electronics PFEA113, User Manual
Chapter 3 Commissioning
3-44 3BSE029382R0101 Rev C
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 Table 3-6. In SW1.8 or later, all signals for each
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
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
Number of load cells connected
to the analog output channel
Value of least significant bit,
Load Division (Resolution)
(F
nom
= Load cell nominal load)
SW 1.0-1.7 SW1.8 and later
One or Two rolls
• 1 or 2 load cells 0.001
 2  F
nom
0.001  2  F
nom
• Difference signal 0.001  F
nom
0.001  2  F
nom
Segmented roll
• 3 load cells 0.001
 3  F
nom
0.001  12  F
nom
• 4 load cells 0.001  4  F
nom
0.001  12  F
nom
• 5 to 8 load cells
(1 to 4 load cells + AI1)
0.001  8  F
nom
0.001  12  F
nom
• 9 to 12 load cells
(1 to 4 load cells + AI1 + AI2)
0.001  12  F
nom
0.001  12  F
nom
• Difference signal 0.001  F
nom
0.001  12  F
nom