Publication 1769-UM009B-EN-P - May 2002
6-18 Using the 1769-SDN Scanner Module with CompactLogix Controllers
For this example, a total of 14 input words are needed to map the I/O
in the 1769-ADN system back to the CompactLogix controller via the
1769-SDN. This must then be added to the 66 status words to calculate
the number of input words to enter into the Generic Profile for the
scanner, as shown in Table 6.4. Also, we must add the 3 output words
to the 2 Module Command Array words and include this in the
Generic Profile for the scanner as well.
As shown in Table 6.4 on page 6-12, the total number of input words
for the Generic profile for this example is 80 and the total number of
output words for the generic Profile for this example is 5.
The total I/O words used by the scanner for this example is then:
8 words + 80 words + 6 words = 94.
This is obviously less than the 194 words of unused I/O remaining
after the 1769-IQ16 and 1769-OV16 modules’ I/O totals were
subtracted from the CompactLogix controller’s I/O capacity. This
application will not exceed the amount of I/O the CompactLogix
controller can access.
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