ABB ControlMaster CM10 User Manual page 89

ControlMaster CM10, CM30 and CM50
Universal process controllers,
...Functions / ...Math Blocks
Setup for All Math Block Types
Eng. Dps
Eng. Low
Eng High
Eng Units
Fault Action
None
Automatic
Upscale
Downscale
IM/CM/S–EN Rev. R
1 1 1
/ , / and / DIN
8 4 2
Selects the resolution required to be displayed for the math block result.
Selects the engineering range low / high value for display and calculation of proportional band.
If the math block result exceeds the Eng High or Eng Low value by more than 10%, the math
block fail state is set and its output is determined by the Fault Action (see below).
The selected units are displayed in the operator pages – see Appendix C, page 122 for
description of engineering units.
The value returned when the math block fails can be configured.
Failed calculated value is used as math block output.
If the failed calculated output value is below zero the output is driven to its minimum value.
If the failed calculated output value is above zero the output is driven to its maximum value.
If the math block fails, its output is driven to its maximum value.
If the math block fails, its output is driven to its minimum value.
7 Advanced Level
87