Table of Contents
Advertisement
Programming Function Blocks and Features
Math
Performs math on up to 8 inputs using a single operator. Output is CVn OV. Division by 0 is indicated
by CVn OV's displayed value flashing 0.
Table 4-22 describes the Math prompts. See Table 4-2 for additional prompts.
Prompt
INPUT A - INPUT H
OUTPUT LOW LIMIT
OUTPUT HIGH LIMIT
OPERATOR
FEEDBACK
114
Table 4-22 Math Prompts
Range/Selections
OFF, analog parameter,
number.
Enter limits
ADD, SUBT, MULT, DIV,
ABSVAL, SQRT and
STDDEV.
OFF, analog parameter,
number
FB
PID
Figure 4-4 Math CV Feedback Programming
Video Recorder – User Manual
Enter up to 8 input sources.
If connecting to an upstream loop, that loop output (LP# OV)
MUST be INPUT A (see Feedback).
Displayed output value will be clamped and will flash when
these limits are exceeded.
1. Input A OPERATOR Input B OPERATOR...Input H
where OPERATOR is one of these:
add, subtract, multiply, or standard deviation
(Standard Deviation uses all inputs.)
Example: Input A minus Input B minus ...Input H.
2. OPERATOR Input A
where OPERATOR is absolute value or square
root.
3. Input A OPERATOR Input B
where OPERATOR is divide.
Note: Inputs 3-8 are not used in division.
Select LP# BC or AO# BC to propagate the back calculation
(BC) value from a downstream loop or AO. Also, program
the upstream loop's feedback with this Math CV's back
calculation value (CV# BC). You MUST program this CV's
feedback to NONE if this CV is not used as part of a control
loop output configuration (Figure 4-4). If it is part of a loop
configuration, the math operator cannot be ABSVAL, SQRT,
or STDDEV.
BC
FB
MATH
INP 1
CV
Definition
BC
PID
OR
AO
Advertisement
Table of Contents
