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R-119
A Standard System Protocol
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
R-6 Ha
y
es Mod
e
m A
T
Com
m
and
Pr
otoc
o
l
Re
f
R
-6-2
Connections
The connections when using the Hayes Modem AT Command Protocol is shown below.
RS-232C Connection
Although most of the sequences in this protocol can be used regardless of modem, the sequences Ini-
tialize Modem (specialized) and Dial can be used only for the following Modems:
•
MD24FB10V (OMRON Modem)
•
MD144FB5V (OMRON Intelligent Modem): No longer manufactured
•
ME1414B
III
, ME2814B
II
(OMRON FAX/DATA Modem)
For other modems, perform a modem initialization using the sequence No. 550, Initialize modem (gen-
eral-purpose) and dial using the sequence No. 553, Data Send/Receive (general purpose sequence).
R-6-2
Connections
R-6-3
Compatible Modems
Modem
Telephone line
Modem
Serial Communications Board
(CS Series only)
Serial Communications Unit
(CS/CJ Series)
FG
SD
RD
RTS
CTS
5V
DSR
DTR
SG
FG
SD
RD
RTS
CTS
DSR
SG
CD
ST2
RT
DTR
CI
ST1
Modem: D-sub
25-pin (female)
Serial Communications Board/Unit
D-sub 9-pin (female)
1
6
5
9