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8.
COMMUNICATIONS USING DEDICATED PROTOCOLS
MELSEC-A
(4)
PC CPU numbel
The PC CPU number determines which PC CPU on MELSECNET to
access.
The PC CPU number may be from O O H to 40H (00 t o 64) in 2-digit ASCII
(hexadecimal).
(a) Accessing PC CPUs equipped with AJ71C24 to which
a
computer
is connected
Set all PC CPU numbers to FF (self) using the computer. Use any
function except the on-demand function.
(b) Accessing PC CPUs on MELSECNET equipped with AJ71C24
1) When computer and master station are connecterd
MELSECNET local and remote
I10
stations: Set each slave link
station number (1 to 64) in hexadecimal (OlH to 40H)
2) When computer and local station are connected
MELSECNET master stations: Set the PC CPU number to O O H
(c) The ranae of PC CPUs which can be accessed bv setting the PC
CPU numbers is shown below.
,----.--------------------
:
M
. . . .
Master station
(1st tier)
:
:
L1
........
Local station
(2nd tier)
:
j
L2lm
....
Local station
(2nd tier)
j
Master station
:
L3
........
Local station
(2nd tier)
:
:
R4
........
Remote 110 station (2nd tier)
:
:
I1
.........
Local station
(3rd tier)
j
:
1 2
.........
Local station
(3rd tier)
j
:
r3
.........
Remote 110 station (3rd tier)
:
:
14
.........
Local station
(3rd tier)
:
,--------.-.------------------.-2
PC CPU loaded
with AJ71C24
connected
o
Access to all devices possible by setting appropriate
PC CPU numbers
o *1
Access to special-function module buffer memoly possible by
setting appropriate PC CPU numbers
C o m m u n i c a t i o n s i s n o t p o s s i b l e w i t h AOJ2CPUP23/R25 or
AOJ2CPUP25IR25 CPUs.
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