Specifications

1 - 4
(3) Providing various communication services
(a) The transient transmission can be performed by designating a channel
number (1 to 64) of the receiving station. This function allows to set (change)
the channel numbers arbitrarily with the sequence programs and to perform
the transmission to multiple stations with the same channel number at one
time.
Sender
Receiver
channel
No.9
Discard
Acknowledged
Receiver
channel
unmatched
Network
module
QCPU
Send
D
e
s
t
i
n
a
t
i
o
n
c
h
a
n
n
e
l
N
o
.
9
No.1
Channel 1
2
Receive
J. SEND
MELSECNET/H
Receiver
channel
No.9
Receiver
channel
No.9
Receiver
channel
unmatched
Discard
Acknowledged
Acknowledged
Network
module
QCPU
3
7
8
Channel
No.2
No.3
No.9
Channel
No.20
J. RECV
(b) By using the low-speed cyclic transmission function, it is possible to cyclically
send the data that does not require the high-speed transmission in a batch
mode, separately from the normal cyclic transmission (LB/LW). The
high-speed transmission can be achieved by efficiently dividing data to be
transmitted into the data that requires the high-speed transmission, which is
sent by the normal cyclic transmission, and the other data that is sent by the
low-speed cyclic transmission.
There are three types of transmission method depending on how the
transmission is activated.
1) "Transmission of data for one station in one link scan" (default)
2) "Periodical cycle interval" which transmits in a set time cycle (h/min/s)
3) "System times" which transmits at the designated time
(year/month/day/h/min/s)
MELSECNET/H
T
ra
n
s
m
i
s
s
i
o
n
a
t
t
h
e
d
e
s
i
g
n
a
t
e
d
t
i
m
e
Low-speed cyclic
transmission data