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IEEE-488 Programming
all
data
is
sent
in
one
talk;
for
G7,
the
data
from one
switching
system
is
sent per
talk.
These
formats
are
shown
in
Figure 5-13
for the
example
setup
of Table
5-10.
Table
5-10
Master/slave setup
example
Unit
Closed
crosspoints
Master
Slave
1
Slave
2
Slave 3
Slave
4
A1,A2,B3,
B5,C7,
C8, D9,
D10,Fll,F12
A13,
A14,C15,C16,
E17,
E18
A25, A26, H27, H30,
A36
A37, H38, H43,
G48
G49, A50, A51, H55, H56,
E57,
E60
Obtaining data
Generally, data
is
placed
into
a
string
or
numeric
variable.
For example,
a
typical input
sequence
in
BASIC
is:
PRINT
#1,
"ENTER
18"
LINE INPUT
#2,
CROSSPOINT$
In this
example,
the
complete
crosspoint
string
is
placed
in
the
CROSSPOINT$
variable.
5-21
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