Rockwell-automation AutoMax Enhanced Ladder Language Reference Manual Manual de usuario Pagina 201

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9.7 Errors Caused by Shift Register Instructions
This section describes the possible errors for all Shift Register instructions and those
additional errors specific to the ROL, RL, ROR, and RR instructions.
9.7.1 Errors Caused by All Shift Register Instructions
These errors can occur when you are using the Shift Register instructions in a program.
They are logged in the error log.
If this error occurs:
Then: Do the following:
Array index is negative. ENO is set according to
ERROR_ENO, and element
zero of the array is used for
the instruction's operation.
Specify a valid array element.
Array index is too large. ENO is set according to
ERROR_ENO, and the last
element in the array is used
for the instruction's
operation.
Specify a valid array element.
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