
B–63003EN/04
10. CONNECTION TO FANUC I/O Link
353
NOTE
1 Xm+1.0 to Xm+1.7 and Xm+3.0 to Xm+3.7 are DI points that
allows common selection. This means that by connecting
the DICOM1 pin (CM58–A02) and DICOM3 pin
(CM58–B02) to +24 V, the DI signal whose logic is inverted
can be applied. In this case, however, if the cable is struck
by lightning, it has the effect of turning on the DI signal. For
safety reasons, therefore, the connection of the DICOM1
and DICOM3 pins to 0 V is recommended whenever
possible.
2 From the viewpoint of safety, an emergency stop signal
needs to assigned to the corresponding bit of addresses
Xm+2.0 to Xm+2.7 tied to the common signal. Determine
the location of an emergency stop signal as described in
Section 10.12.12.
3 The unused DI points of addresses Xm+2.0 to Xm+2.7 tied
to the common signal are used as inputs tied to 0. The
unused DI points of addresses Xm+1.0 to Xm+1.7 and
Xm+3.0 to Xm+3.7 that allow common selection are input
signals tied to 0 when the DICOM1 pin (CM58–A02) and
DICOM3 pin (CM58–B02) are connected to 0 V; the unused
DI points are input signals tied to 1 when the DICOM1 pin
(CM58–A02) and DICOM3 pin (CM58–B02) are connected
to +24 V. When the DICOM1 pin (CM58–A02) and DICOM3
pin (CM58–B02) are open, the logic of the unused DI points
at addresses Xm+1.0 to Xm+1.7 and Xm+3.0 to Xm+3.7 is
undefined.