User`s manual

3-2 • E2 User’s Manual Supplement: Flexible Combiner 026-1620 Rev 0 09-15-05
3.1.1 Equation Troubleshooting
Tips
Test Your Equations
Especially if an equation you are using is complex,
validate the equation is working as you intended it by con-
trolling the input values being fed into the equation.
The easiest way to do that is to override inputs from
the Flex Combiner Status screen and watch what happens
to the outputs.
• On the Flex Combiner Status screen, highlight the
input value with the arrow keys.
Mismatch() Mismatched parenthesis Verify that each open parenthesis “(“ has a corresponding
close parenthesis.
Example: ((AI3+7)*2 should be ((AI3+7)*2).
Missing() A function that requires arguments in parenthesis
does not have parenthesis.
Verify if a function needs parenthesis that they are present and
correctly paired: for example, SIN(PI) is correct, not SIN PI
or SIN (PI. This will also occur if you used a function that
requires no arguments and did not include the parenthesis:
TIME() is correct, not TIME.
Missing Arg A function does not have enough arguments. Verify the function has all the arguments they require, and that
each argument is separated by a comma. CUTI-
NOUT(AI1,60,100) will return a Missing Arg error (no
between argument).
Bad Type A function name or operator is incorrectly used or
spelled, or a type mismatch or typographical error
has occurred in one or more arguments.
Check the equation carefully and make sure all input and out-
put variable names and function names are spelled correctly.
Bad Type can also occur when a type suffix is misspelled:
AI1+38F is a Bad Type error because there is no F type suffix
(AI1+38DDF is correct).
This can also be caused by incorrect operators: DI1&DI7 is
wrong; DI1&&DI7 is correct.
Bad Syntax A function has too many arguments, or there is
some other problem with the equation formatting.
Check the arguments for each function and make sure there
are exactly the number required, separated by commas and
properly closed in parenthesis. If using a function that takes no
arguments, verify the parenthesis after the function name have
nothing between them: NEWMINUTE(TIME()) is incorrect;
NEWMINUTE() is correct.
Divide by 0 Based on the current values of all inputs used in
this equation, a number is being divided by zero,
thus giving an invalid result.
This might occur if you are using an input as a divisor. For
example, DI1/DI2 would be just fine as long as DI2 is ON
(1.0); however, when DI2 is 0.0, the result is DI1/0.0, which is
invalid. Avoid creating equations that use inputs as divisors.
Bad Result Based on the current values of all inputs used in
this equation, the result is not a real number.
This might occur if using an input in a function that, depend-
ing upon the value of the input, yields an imaginary number.
SQRT(AI1) would be a Bad Result error when AI1 is nega-
tive because the result is an imaginary number; also
ASIN(AI2) would give a Bad Result error if AI2 was greater
than 1 or less than -1.
Bad Value A value passed to a function is incorrect for that
function.
If using inputs as arguments, verify the values being passed
from these inputs are valid values the function can use as argu-
ments.
Message Description Resolution
Table 3-1
- Equation Errors