
8.CONNECTION TO FANUC I/O Link B-63943EN/02
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8.9.5 I/O Mapping
I/O address map is as follows.
DI mapping should be assigned 1 group = 16 byte mapping and DO
mapping should be assigned 1 group = 8 byte mapping. The reason is
as follows.
MPG interface(the counter for MPG) uses Xm+12 to Xm+14 area and
it is fixed. And if MPG interface will be used, Xm+12 to Xm+14 area
must be assigned. therefore, in case of 30i series and using MPG
interface, DI mapping must be assigned 16 byte mapping. MPG
counter area are directly processed by CNC software. So you must not
use this area by customer ladder.
When the MPG interface is not used, its DI area may be assigned to
another I/O group. I/O mapping of the standard machine operator's
panel can basically be assigned to any area of addresses. As for DI
mapping, however, there are fixed signals directly monitored by the
CNC. The fixed signals cannot be assigned to the keyswitch-input
area. To use the fixed signals, therefore, assign them to an area other
than the keyswitch-input area.