Datasheet

218 Programmable Controllers
Other Protocols
Host Links
Host Link (C-mode) commands or FINS commands placed within host
link headers and terminators can be sent to a host computer to read/
write I/O memory, read/control the operating mode, and perform other
operations for the PLC.
Unsolicited messages can also be sent from the PLC to the host com-
puter by sending FINS commands from the ladder program using the
SEND(090), RECV(098), and CMND(490) instructions.
Custom Protocols
I/O instructions for communications ports (TXD/TXDU, RXD/RXDU)
can be used for simple data transfers (custom protocols), such as to
input data from bar code readers or output data to a printer. Start/end
codes can be specified, and RS, CS, and other control signals can be
handled.
1:N NT Links with High-speed Links
The PLC can be connected to a Programmable Terminal (PT) via RS-
232C or RS422A/485 ports, and I/O memory in the PLC can be alloca-
ted to various PT functions, including status control areas, status noti-
fications areas, touch switches, lamps, memory tables, and other
objects.
Note: Either one or up to eight PTs can be connected to a PLC in 1:N
NT Links.
High-speed NT Links that are three times faster are possible with the
NS Series and version 2 of the NT631 and NT31 Series. This speed is
particularly important when connecting to more than one PT.
Serial Gateway Function
(CPU Unit Ver. 3.0 or later, Serial Communications Unit
Ver. 1.2 or later only)
When a FINS command containing a CompoWay/F command is recei-
ved via network or serial communications, the command is automati-
cally converted to a protocol suitable for the message and forwarded
using serial communications. This enables access to CompoWay/F-
compatible components from a personal computer, PT, or PLC via a
network.
Allows many applications to be easily achieved, such as exclusive control between PCB loaders and unloaders and temperature information and
time management between conveyor ovens. Up to 9 CJ1M CPU Units can be connected, with up to 10 words of data between them managed by
the built-in RS-232C port. The RS-232C can be converted to RS-422A simply by using a CJ1W-CIF11 RS-422A Conversion Adapter.
Command
Response
TXD
RXD
or
CPU Unit
General-purpose
external device
CPU unit
CompoWay/F-compatible
components
CompoWay/F
Serial PLC Links (CJ1M CPU Unit’s Built-in RS-232C Port)
PT
MasterSlave Slave No. 0 Slave No. 1 Slave No. 7
10 words
10 words
10 words
10 words
Master
Slave No. 0
Slave No. 1
Slave No. 7
Master
Slave No. 0
Slave No. 1
Slave No. 7
Master
Slave No. 0
Slave No. 1
Slave No. 7
Master
Slave No. 0
Slave No. 1
Slave No. 7
NT-series and NS-series
PTs can also be connected
as slaves to the PLC Links
using a 1:N NT Link. Data is
exchanged only with the
master CJ1M PLC.
One slave node is allocated
for arch PT.
NS-AL002
required with
NS-series PT.
RS-422A/485
RS-422A Adapter
CJ1W-CIF11
Total cable length: 50 m max.
Y201-EN2-03.book Seite 218 Donnerstag, 30. März 2006 1:52 13