Rockwell Automation 2707-NP2 MICROVIEW SOFTWARE PROGRAMMING MANUAL - Manual (Page 25)

Publication 2707-PM002B-EN-P
Designing Microview Applications 3-5
Scaling Formulas
The scaling formula for a MicroView display value is:
The scaling formula for an entered valued is:
Displayed Value = m x Register Value + b
Where:
Display Maximum Value - Display Minimum Value
Register Maximum Value - Register Minimum Value
Display Maximum Value - Display Minimum Value - (m x Register Minimum Value)
m =
b =
Register Value = m x Entered Value + b
Where:
Register Maximum Value - Display Minimum Value
Entry Maximum Value - Entry Minimum Value
Register Minimum Value - Entry Minimum Value - (m x Entry Minimum Value)
m =
b =
Register Range = 0 to 4,095
Display Range = -100 to +300
Actual Register Value = 2,047
m =
300 - (-100)
4,095 - 0
= 0.0977
b = -100 - (0.0977 x 0) = -100
Displayed Value = 0.0977 x 2,047 + (-100)
= 99.9919
= 100
Scaling Example: