Fuji Electric OPC-PRT - Page 81

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Because both the EtherNet/IP consumed and produced data word configurations are comprised of 32
function code definitions, the targeted “offset/element” must be within the range of 0 to 31 inclusive.
Refer to Table 27 for some examples of N50 accesses.
Table 27: Examples of EtherNet/IP-Style Bulk Access via File N50
File/Section
Number
Offset/Element
Address
Format
Start Target
Function Code of
Configuration Array
Max Number of
Accessible
Elements
N50
0
N50:0
1st
32
N50
:
:
:
:
N50
15
N50:15
16th
16
N50
:
:
:
:
N50
31
N50:31
32nd
1
The application PLC program uses a MSG instruction that is configured with a “Data Table Address”
from which to start the access and a “Size in Elements” which determines the number of items to access
(read or write). The “Data Table Address” is constructed by selecting a “File/Section Number” and an
“Offset/Element” according to Equation 7. For example, a “File/Section Number” of N27 and
“Offset/Element” of 99 = N27:99, which corresponds to register 1799 (the inverter’s operation command
register, function code S06).