Download RP-COM(FIT)GY

3. Explanation in Mode of Operation
Modem Mode
This mode performs RS-232C communications on a packet-by-packet basis using special commands to
control the RP-COM(FIT)GY. As the device ID is added to the transmitted packet data,
communication can be performed with multiple RP-COM(FIT)GY devices.
As operation is controlled by commands, the device connected to the RS-232C port of the RPCOM(FIT)GY requires special application software. Also, the type of data being sent or received can
be identified as either text data, binary data, Ethernet data, or UDP/IP data. In particular, UDP/IP data
can be used to communicate directly with a Socket interface on a host PC.
The following three types of communication are supported.
(1) Communication with a specified device ID
Communication can be performed between RS-232C devices connected to RP-COM(FIT)GY units.
(2) Communications with UDP/IP Socket
This can be used to communicate with Windows PCs or workstations on the LAN.
(3) Build and transmit or receive Ethernet frames
This can be used to communicate with LAN devices that use a protocol other than UDP/IP.
CAUTION
-
Ensure that the specified device IDs are unique
-
Device ID 255 is reserved for broadcasting.
-
To avoid any adverse effects on other LAN devices, set the IP address, subnet mask, and other
network parameters to appropriate values.
Cable LAN
HUB
CONTEC
9II
8X 7X 6X 5X
4 X 3X 2X 1X
PO W E
C O
MOD
RP-COM(FIT)GY
89
67 A
C
BD
01
EF 2
I
345
Vo+
5 V D Vo-
10/10 0M
RS-232C
FG
AC T
LIN
RP-COM
RS-232C Device 3
RP-COM(FIT)GY
RP-COM(FIT)GY
RS-232C Device 2
RS-232C Device 1
ex.) RS-232C(Device)
Cable LAN connection
RS-232C(Device)
Figure 3.2. Modem Mode
12
RP-COM(FIT)GY