Rockwell Automation AutoMax Enhanced Ladder Language Reference Manual - Manual (Page 266)

12Ć14
12.4 Errors Caused by the I/O Read and
I/O Write Instructions
This section describes the possible errors for I/O read and I/O write instructions.
If this error occurs: Then: Do the following:
D An illegal slot number of an
IOR or IOW is selected
D An illegal register of an IOR
or IOW is selected
ENO is set according to
ERROR_ENO, and nothing is
written to Out.
Correct the slot and register or
address parameters used in
the instruction.
An illegal option of an IOR or
IOW instruction is selected.
ENO is set according to
ERROR_ENO, and nothing is
written to Out.
Correct the number in the
option field. The valid range is
1Ć4.
The array index is negative ENO is set according to
ERROR_ENO, and element
zero of the variable will be
used for the instruction's
operation.
Specify a valid array element.
The array index is too large ENO is set according to
ERROR_ENO, and element
zero of the variable will be
used for the instruction's
operation.
Specify a valid array element.
(I/O Read Only)
The result is larger than what
Out's data type supports
ENO is set according to
ERROR_ENO, and Out
contains the largest signed
value allowed for the data type
being used.
Specify the variable in Out to
be a double integer.