57
Communications Functions
Section 1-6
Master: DM 6645: 3200 (1:1 Data Link Master; Area used: LR 00 to LR 15)
Slave: DM 6645: 2000 (1:1 Data Link Slave)
The defaults are assumed for all other PC Setup parameters. The words used
for the One-to-one Data Link are as shown below.
When the program is executed at both the master and the slave, the status of
IR 001 of each Unit will be reflected in IR 100 of the other Unit. Likewise, the
status of the other Unit’s IR 001 will be reflected in IR 100 of each Unit. IR 001
is an input word and IR 100 is an output word
In the Master
In the Slave
1-6-5
NT Link 1:1 Mode Communications
This section explains communications with a Programmable Terminal with the
communications mode set to NT Link in 1:1 mode. The peripheral port cannot
be used for NT Link communications.
Settings
Set the communications mode to NT Link in 1:1 mode by setting DM 6645 to
4000. Be sure that pin 5 of the CPU Unit’s DIP Switch is OFF.
For details on Programmable Terminal settings, refer to the Programming Ter-
minal’s Operation Manual.
Overview of NT Link 1:1
Mode Communications
NT Link communications were developed by OMRON to provide high-speed
communications between the PC and a Programmable Terminal. There are
two kinds of NT Link communications: 1:1 mode in which a single Program-
mable Terminal is connected to the PC and 1:N mode in which several Pro-
grammable Terminals can be connected to the PC. The CQM1H’s built-in RS-
232C port supports only 1:1 mode communications, but both 1:1 and 1:N
LR 00
LR 07
LR 08
LR 15
LR 00
LR 07
LR 08
LR 15
Master
Area for writing
Area for reading
Slave
Area for writing
Area for reading
25313 (Always ON)
MOV(21)
001
LR00
MOV(21)
LR08
100
MOV(21)
001
LR08
MOV(21)
LR00
100
25313 (Always ON)
