690
(7) Interlock when using the multiple CPU high-speed transmission dedicated instruction
(a) Special relays SM796 to SM799 (maximum number of used blocks for multiple CPU high-speed transmission
dedicated instruction setting) can be used as an interlock for the multiple CPU high-speed transmission dedicated
instruction.
When executing the multiple CPU high-speed transmission dedicated instructions concurrently, use SM796 to
SM799 as an interlock for the instructions.
When using special relays SM796 to SM799, set the maximum number of blocks for the instruction used for each CPU to
special registers SD796 to SD799. (For example, when the maximum number of blocks for the multiple CPU high-speed
transmission dedicated instruction to be executed to CPU No.3 is 5, set 5 to SD798.)
When the multiple CPU high speed transmission area becomes equal to or less than the number of blocks set at SD796 to
SD799, the corresponding special relay (SM796 to SM799) turns on.
CP
U N
o
.
1
CP
U N
o
.
2
E
xecut
i
on
command
SM
797
DP
.
DDWR
H
3
E
1
N
umber
of
request
b
l
ocks
:4
T
urns
on
w
hen
the
number
of
empty
b
l
ocks
i
s
l
ess
than
the
number
of
b
l
ocks
used
for
the
DP
.
DDWR
i
nstruct
i
on
.
(
T
he
DP
.
DDWR
i
nstruct
i
on
i
s
not
executed
.
)
Mu
l
t
i
p
l
e
CP
U
h
i
gh
speed
transm
i
ss
i
on
area Mu
l
t
i
p
l
e
CP
U
h
i
gh
speed
transm
i
ss
i
on
area
Send
area
(1
2)
Rece
iv
e
area
(1
2)
Dur
i
ng
use
N
umber
of
empty
b
l
ocks
:
2
I
nsuff
i
c
i
ent
for
w
r
i
t
i
ng
a
request
from
the
DP
.
DDWR
i
nstruct
i
on
.
E
mpty
area
of
the
request
b
l
ocks
i
n
send
area
(1
2)
has
been
i
ncreased
.
CP
U N
o
.
1
CP
U N
o
.
2
E
xecut
i
on
command
SM
797
DP
.
DDWR
H
3
E
1
N
umber
of
request
b
l
ocks
:4
Mu
l
t
i
p
l
e
CP
U
h
i
gh
speed
transm
i
ss
i
on
area Mu
l
t
i
p
l
e
CP
U
h
i
gh
speed
transm
i
ss
i
on
area
Send
area
(1
2)
Rece
iv
e
area
(1
2)
Dur
i
ng
use
N
umber
of
empty
b
l
ocks
:
8
T
urns
off
as
empty
b
l
ocks
by
the
number
of
b
l
ocks
used
for
the
DP
.
DDWR
i
nstruct
i
on
became
a
v
a
il
ab
l
e
(
T
he
DP
.
DDWR
i
nstruct
i
on
can
be
w
r
i
tten
.
)
T
he
request
from
the
DP
.
DDWR
i
nstruct
i
on
can
be
w
r
i
tten
.