270
Serial Communications
Section 6-3
PLC Setup
Note Set the baud rate to 115,200 bps when making settings with the CX-Program-
mer.
PT System Menu
Set the PT as follows:
1,2,3...
1.
Select NT Link (1:N) from Comm. A Method or Comm. B Method on the
Memory Switch Menu under the System Menu on the PT Unit.
2.
Press the SET Touch Switch to set the Comm. Speed to High Speed.
6-3-4
Serial PLC Links (CJ1M CPU Units Only)
Overview
Serial PLC Links are supported by CJ1M CPU Units only. They allow data to
be exchanged among CJ1M CPU Units via the built-in RS-232C ports without
requiring special programming. Words are allocated in memory in the Serial
PLC Link Words (CIO 3100 to CIO 3199). RS-232C connections can be used
between CPU Units, or RS-422A/485 connections can be used by connecting
RS-232C-to-RS-422A/485 converters to the RS-232C ports. CJ1W-CIF11
RS-422A Converters can be used to convert between RS-232C and RS-
422A/485.
A PT that is set for NT Link (1:N) communications can also be used together
on the same network. The polled PT uses the network to communicate in an
NT link (1:N) with the polling CPU Unit. When a PT is connected, however, the
addresses in the Serial PLC Link Words corresponding to the PT’s unit num-
ber are undefined.
Communications
port
Programming
Console setting
address
Name
Settings
contents
Default values
Other conditions
Peripheral port
144
Bits:
8 to 11
Serial communica-
tions mode
02 Hex: NT Link
(1:N mode)
00 Hex: Host Link
Turn ON pin 4 on
the CPU Unit DIP
switch.
145
Bits:
0 to 7
Baud rate
00 to 09 Hex:
Standard NT Link
0A Hex: High-
speed NT Link
(see note 1)
00 Hex: Standard
NT Link
150
Bits:
0 to 3
NT Link mode
maximum unit
number
0 to 7 Hex
0 Hex (Max. unit
No. 0)
---
RS-232C port
160
Bits:
8 to 11
Serial communica-
tions mode
02 Hex: NT Link
(1:N mode)
00 Hex: Host Link
Turn OFF pin 5 on
the CPU Unit DIP
switch.
161
Bits:
0 to 7
Baud rate
00 to 09 Hex:
Standard NT Link
0A Hex: High-
speed NT Link
(see note 1)
00 Hex: Standard
NT Link
166
Bits:
0 to 3
NT Link mode
maximum unit
number
0 to 7 Hex
0 Hex (Max. unit
No. 0)
---
Summary of Contents for CJ1G-CPU series
Page 3: ...iv...
Page 5: ...vi...
Page 21: ...xxii Conformance to EC Directives 6...
Page 169: ...148 Task Control Instructions Section 3 32...
Page 203: ...182 Programming Device Operations for Tasks Section 4 4...
Page 253: ...232 Using File Memory Section 5 3...
Page 337: ...316 Other Functions Section 6 11...
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