
B–63083EN/02
9. CONNECTION TO FANUC I/O Link
119
On Series 21i/210i, the interface connector JD1A for I/O Link is provided
on the main board.
In the I/O there are the master station and its slave stations. The master
is the control unit of the CNC, and the slave is the I/O unit–A. The slaves
are divided into groups, and up to 16 groups can be connected to one I/O
Link. A maximum of two base I/O units can be connected as a group.
The I/O Link is connected in different ways depending on the types of
units actually used and the I/O points. To connect the I/O Link, the
assignment and addresses of the I/O signals have been made
programmable with the PMC program. The maximum number of I/O
points is 1024.
The two connectors of the I/O Link are named JD1A and JD1B, and are
common to all units (that have I/O Link function). A cable is always
connected from JD1A of a unit to JD1B of the next unit. Although JD1A
of the last unit is not used and left open, it need not be connected with a
terminator.
The pin assignments of connectors JD1A and JD1B are common to all
units on the I/O Link, and are illustrated on Subsec. 9.2.1. Use the figures
when connecting the I/O Link irrespective of the type of unit.
…
…
Main
board
JD1A
I/O256/256 or less per group
I/O1024/1024 or less in total I/O Link
FANUC I/O Link
FANUC I/O Unit– MODEL A 2max
Base unit 1 Base unit 2
Series 21
control unit
Magnetic
circuit
Max.
16 group
JD1B
JD1A
JD1B
JD1A
JD1B
JD1A
Group
#0
Group
#1
Group
#2
Fig. 9.2 I/O Link connection diagram
9.2
CONNECTION