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4
27GFK–0644 Chapter 4 Programming Guide
Using Nicknames for the %P References
If you want to use the %P nicknames listed in the table, add them to the Variable
Declaration Table (see page 24).
Global (%G) References for the I/O Link Program Blocks
The %P references listed in the previous table are used for link configuration, control,
and monitoring. They will be included in the application program as explained on
subsequent pages.
An I/O Link Program Block also uses certain %G references for its own operations.
These %G references should not be included in the application program. They should be
reserved for the exclusive use of the Program Block.
Program Block Identifier %G References to be
Reserved
LINK73X %G1025 – %G1040
LINK77X %G1025 – %G1040
%GA1025 – %GA1040
%GB1025 – %GB1040
LINK78X %G1025 – %G1040
%GA1025 – %GA1040
%GB1025 – %GB1040
%GC1025 – %GC1040
%GD1025 – %GD1040