Rockwell Automation AutoMax Enhanced Ladder Language Reference Manual - Manual (Page 243)

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10.7.3 Errors Caused by the Array Compare Instruction
Errors only occur when parameters are latched and checked. If an error occurs at this
point, the DN output is set true.
When an error occurs, ENO is set to ERROR_ENO.
These errors can occur when you are using the ARC instruction in a program.
If this error occurs: Do the following:
Array's length inputs are greater than
1 but are not equal.
Make sure the values are equal.
The Elems/Scan input is less than 0. Specify a value of 0 or greater.
D The value in Length1 is too large
for array block's In1.
D The value in Length2 is too large
for array block's In2.
(These inputs can exceed the
array size if starting at the first eleĆ
ment or if starting somewhere withĆ
in the array.)
D The value in Length1 is less than
or equal to 0.
D The value in Length2 is less than
or equal to 0.
Make sure the lengths are within the
range of the array.
D The array index is negative.
D The array index is too large. Specify a valid array element.