
B-61813E/03 CONNECTIONS 1. FANUC I/O LINK
−5−
1.2 ALLOCATION OF I/O POINTS
I/O Link has 1024 input points and 1024 output points as viewed from
the master.
I/O data is periodically transferred between the master and slaves by
allotting these I/O points to each slave.
Each slave occupies specified number of I/O points. Sum of I/O points
occupied by all slaves in an I/O Link is restricted as follows:
Number of input points ≦ 1024
Number of output points ≦ 1024
Number of actual I/O points may differ from that of the occupied ones.
How to determine the number of I/O points to be allotted to each slave
and restrictions for allocation are shown in the followings.
(For the allocation method for I/O points, refer to the PMC
PROGRAMMING MANUAL.)
Number of actual and occupied I/O points are shown in Table 1.2.
Table 1.2
Actual I/O points Occupied I/O pointKind of slave
Input
points
Output
points
Input
points
Output
points
Remarks
I/O Unit-A Each
input
moudle
points
Each
output
module
points
Refer 3 of next page
A96 64Operator's
panel conne-
ction unit
B64 32
128 64
32 32 32 32Power Mate
64 64 64 64
Either I/O
point
can be
allocated.
32 32 32 32Series 0-C
64 64 64 64
Either I/O
point
can be
allocated.