Rockwell Automation 8520-9API 9/Series OCI API Developer's Guide - Manual (Page 84)

4–36 OCI Data Server Data Items
Publication 8520-6.6 - August 1999
Channel Number – (word two value is 4(head) or 5(tail)). Word 3
returns a value corresponding to the communications channel which
has the error. 1 indicates Port A, 2 indicates Port B.
Slot Number – (word two value is 6 or 7). Word 3 returns a value
corresponding to the slot number of the offending axis module in a
1394 or 9/440 amplifier rack.
For example if:
LINE_1_MESSAGE_DATA,1 = 48
LINE_1_MESSAGE_DATA,2 = 3
LINE_1_MESSAGE_DATA,3 = 5
it indicates message base 48 (see your PAL/Logic Manual system
error detection chapter) should be displayed followed by axis names
for logical axes 1 and 3 (00101). Assuming logical axes 1 and 3 axis
names are X and Z the error message should read:
EXCESS SKEW ON XZ
or if:
LINE_1_MESSAGE_DATA,1 = 55
LINE_1_MESSAGE_DATA,2 = 1
LINE_1_MESSAGE_DATA,3 = 16
it indicates error message 16 from message base 55 (see your PAL
Manual or 9/PC Logic Interface Reference Manual system error
detection chapter) should be displayed with no special head or tail
characters. This error message should read:
INVALID AMP–DEFINED G CODE
Important: Source files are available with the Allen-Bradley OCI
Basic Display set source code that have all error
message strings and their corresponding message bases.
Code is also available with the Basic Display Set source
that manages these data items and displays errors
accordingly. Line 1 Message Data has a 4th entry for
“dual process” only.