Chapter 2 Basic Unit Specification
3. Communication ports
2-9
3.2 Function description for 3 communication port
<1>
PC/PDA
port
<2>
RS485/ RS232
expansion card
<3>
RS485
port
Description
A
Program up/down
load
◎
Upload or download the user program
to/from TP03 or update system
program.
B
Modbus slave
(Only RTU)
◎ ◎ ◎
Available for PC/PDA monitoring the
TP03. All the three ports are available
for such function (refer to 3.3.1)
C
Data Link
〇 〇
The two ports can not be enabled
simulataneously for such function.It
must be used together with application
instruction F190 (refer to 3.3.2 and
instruction description F190)
D
Remote IO
〇 〇
The two ports can not be enabled
simulataneously for such function.It
must be used together with application
instruction F191 (refer to 3.3.3 and
instruction description F191)
E
RS instruction
◎ ◎
The two ports can be enabled
simulataneously for such function and
communication protocol is
unnecessary.It must be used together
with application instruction F80 (refer
to 3.3.4 and instruction description
F80)
F
MBUS instrucditon
(ASCII or RTU)
◎ ◎
The two ports can be enabled
simulataneously for such function and
communication protocol Modbus is
necessary.It must be used together with
application instruction F87 (refer to
3.3.5 and instruction description F87)
Special registers for
setting communication
format and Baud Rate
D8321 D8320 D8120
Built-in Optional
Built-in
for H type
Remarks
◎: having such function, available for more than one port using simultaneously.
〇: having such function, only one port is available for such function at one time.