17 - 4 17 - 4
MELSEC-Q
17 COMMUNICATIONS BETWEEN THE MULTIPLE PLC SYSTEM'S I/O
MODULES AND INTELLIGENT FUNCTION MODULES
(3) Output to output modules and intelligent function modules
It is not possible to output ON/OFF data to non-control modules.
ON/OFF will be performed within the High Performance model QCPU when the
output from output modules and intelligent function modules controlled by other
PLCs, such as sequence programs, have been set to ON/OFF, but this will not
be output to output modules or intelligent function modules.
(4) Accessing the intelligent function module buffer memory
(a) It is possible to read data from the buffer memory of intelligent function
modules being controlled by other PLCs with the commands listed below.
• FROM command
• Commands that use intelligent function module devices (U \G )
P
o
w
e
r s
upp
ly
PL
C No
.1
0
1
2
In
te
lli
gent
fu
nct
ion m
odul
e
In
put
mo
du
le
3
4
5
In
put
mo
du
le
6
O
u
tp
ut
mo
dul
e
7
Readable from the buffer memory
with the FROM command and U \G
Slot No.
Control PLC
settings
PL
C No
.1
Readable from the buffer memory with the
FROM command and U \G
PL
C No
.2
In
te
lli
gent
fu
nct
ion m
odul
e
In
te
lli
gent
fu
nct
ion m
odul
e
In
te
lli
gent
fu
nct
ion m
odul
e
O
u
tp
ut
mo
dul
e
PL
C No
.1
PL
C No
.1
PL
C No
.1
PL
C No
.2
PL
C No
.2
PL
C No
.2
(b) It is not possible to write in the buffer memory of intelligent function modules
being controlled by other PLCs.
• TO instruction
• Intelligent function module devices (U \G )
• Intelligent function modules dedicated commands
An "SP UNIT ERROR (error code: 2116)" will be triggered if an attempt to
write in the intelligent function module controlled by other PLCs is carried
out.
0
1
2
3
4
5
6
7
Not writable write in the buffer
memory with the TO command
and U \G
Not writable write in the buffer memory
with the TO command and U \G
Po
w
e
r s
u
pp
ly
P
L
C No
.1
Inpu
t mo
d
u
le
Inpu
t mo
d
u
le
O
u
tput
m
o
d
u
le
P
L
C No
.2
In
te
lli
gent
funct
ion
m
o
d
u
le
In
te
lli
gent
funct
ion
m
o
d
u
le
In
te
lli
gent
funct
ion
m
o
d
u
le
O
u
tput
m
o
d
u
le
PL
C No
.1
PL
C No
.1
PL
C No
.1
PL
C No
.1
PL
C No
.2
PL
C No
.2
PL
C No
.2
Slot No.
Control PLC
settings
Содержание QCPU (Q Mode)
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