Table of Contents
Advertisement
Free Form Math
The output CVn OV is the result of a user-specified equation. QWERTY keyboard may be used for easier
equation entry.
Table 4-23 describes the Free Form Math prompts. See Table 4-2 for additional prompts.
Prompt
OUT LOW LIMIT
OUT HIGH LIMIT
EQ
INPUT A - INPUT H
RESET
12/00
Table 4-23 Free Form Math Prompts
Range/Selections
OFF or number
See Table 4-24.
OFF, analog parameter,
number
OFF, discrete parameter, 0,
1
VPR & VRX – User Manual
Programming Function Blocks and Features
Definition
Displayed output value will be clamped and will flash
when these limits are exceeded.
•
Enter the equation using the QWERTY keyboard.
•
See Table 4-24 for allowable characters and
functions.
•
Enter up to 64 characters (upper or lower case)
•
Spaces are permitted.
•
Enclose a function's argument with parentheses ().
•
Square root argument must be absolute value to
prevent square root of a negative value.
•
Only whole numbers may be used as exponents.
Example: To input this equation
AI 1OV
CN 5 OV X 12
AI 2 OV
enter these settings:
INPUT A:
CN5OV
INPUT B:
12.0
INPUT C:
AI1OV
INPUT D:
AI2OV
EQ:
A*B*SQRT (ABS(C/D))+5
Note how constants can be entered through the
Constant function block (as in example's Input A),
assigned to an input (as in example's Input B), or
entered directly in the equation (as in example with 5).
Enter the parameters or numbers to be used in the
equation.
Resets the function block. Use only when the equation
result is the input to itself (integrating); that is, when the
equation contains the letter O.
+
5
115
Advertisement
Table of Contents
