Scaling Of Profibus Measuring Values - ABB PFEA 111 User Manual

Profibus On/Off
Profibus Address
Measuring Range

3.13.5.2 Scaling of Profibus Measuring Values

3BSE029380R0101 Rev C
Table 3-7. Profibus parameters
Parameter
The Profibus can be enabled and disabled.
If the Profibus is enabled, the Profibus address
must be set in the range 000 - 125.
If the Profibus is enabled, the Profibus
Measuring Range and load division can be set.
The Profibus values can be scaled in two ways:
• Default Scaling – the scaling is only depending on load cell nominal load.
• User defined Scaling – the scaling of the Profibus values can be set by the user.
Default Scaling
This is exactly the same function as in previous software versions, 1.7 and earlier. Older units
can thus be replaced by new units with SW1.8 and later without changing Profibus master setup
using default scaling. The value of the least significant bit is defined as Load Division.
The Load Division is set based on Measuring range
Profibus Measuring Range
  
0.001 2 F 5000
nom
(1) F = load cell nominal load
nom
Example for 1 kN load cells:
With 1 kN load cells the value of the least significant bit is: 0.001

Measuring range: 5000
User Defined Scaling
The Profibus Measuring Range and Load Division can be adjusted to user needs.
Profibus Measuring Range
Profibus Measuring Range (estimated web tension during normal operation) is a parameter
entered by the user. After the user has changed the Measuring Range value, changing Load cell
nominal load does not affect the Profibus scaling. The value of the least significant bit is defined
as Load Division.
Tension Electronics PFEA111/112, User Manual
Section 3.13.5 Handling of Measurement Data through Profibus
Description
Value of least significant bit,
Load Division (Resolution)
0.001

2 10 000 N
 
(1)
2 F
nom
 
2 1000 = 2 N
3-29