
FANUC PMC-MODEL SD7
Programming Manual
01 01.11.26
Hanaoka
New
A-78550E
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Ex1: I/O UNIT-MODEL A is connected with %I1. And %I1 is forced to be
changed.
The input value from a I/O UNIT-MODEL A is periodically transferred to
%I1. Therefore, even if you change the value of %I1 forcedly, the I/O
UNIT-MODEL A would overwrite the input value at next cycle.
The cyclic transfer might be performed to the addresses at which any I/O
device is not assigned. So, you should use the forced I/O function in the
forcing mode without I/O devices when debugging any %I address. As for
the debug of the ladder program with I/O devices, use the forced I/O
function in Override mode explained in next paragraph.
I/O Unit-MODEL A NC
%I1 = 1 %I1 = 1
%I1 is forced to 0 %I1 = 0
%I1 is overwritten by the I/O Unit-MODEL A.
I/O Unit-MODEL A NC
%I1 = 1 %I1 = 1