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HMI-640S User's Manual
Note: To verify that your HMI-640S has joined the net-
work and is properly connected with your host PC,
just try to access your host PC through the Win-
dows CE Explorer by typing
//host_name_of_host_PC
in
the address bar. Press Enter to search for the host
PC. If the connection is successful, you can see
the network shares that is available from the host
PC. Or you can simply "ping" your HMI-640S from
your host PC to make sure TCP/IP is working. (e.g.
c:\ping
IP_address_of_your_HMI-640S or device_name_of
_your_HMI-640S )
6.2 Networking via RS-232
RS-232 is a time-honored standard interface for industrial automa-
tion. It is very convenient to implement albeit much more limited in
its communication distance. The HMI-640S is provided with a RS-
232 port, from which it can be connected to your host PC via a
NULL modem cable.
Please follow the procedure described below to set up network
connection between HMI-640S and host PC via RS-232 interface:
1. Before connecting to RS-232, first make sure your COM port
service on the host PC has been enabled.
Note: If you are running Windows 95/98 on the host PC,
the Com port service should be enabled on default
without extra installation of other component. On
the other hand, if you are running Windows NT on
the host PC, make sure the RAS (i.e.
Remote
Access Service
) service on your host PC system
is running properly. If you have not installed the
RAS service, you must install it on your system.
2. Use the DB-9 NULL modem cable (that accompanies your HMI-
640S) to connect the HMI-640S through its RS-232 port to the COM
port of your host PC.