Advantech HMI-640S Networking via RS-232, RAS service, you must install it on your system

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.

7 6 HMI-640S User's Manual