Rockwell Automation AutoMax Enhanced Ladder Language Reference Manual - Manual (Page 238)

10Ć36
10.6 About the State of the Unary Array, MultiĆArray, and
Array Compare Instruction Outputs under Various
Input Conditions
The following shows the state of each array instruction output under various input
conditions.
Input Conditions Output Conditions
EN instruction's state DN ER Q ENO
true initial scan false false false true
false disabled false false false false
true rising edge: error latching the inputs and outputs true true false false
true rising edge: inputs are latched false false false true
true instruction is executing false false false true
true the operation is complete with an error true true false false
true the operation is complete and errorĆfree true false true true
The AR1 and AR2 instructions do not stop on an arithmetic error. They correct the error,
and the operation continues until it is completed. If multiple errors occur, the first error
is logged and the value pointing to where the error occurred is placed into the Index
output when the instruction has completed.
The ARC instruction does not have an ER output. Errors occur during the initial scan,
setting the DN on.