Chapter 3 Operating the ETC II
Using the ETC II
ETC II Network Communicator
15
Dial-Out Connections
Dial-out connections are normally used with eXpertPower
TM
applications.
The ETC II eXpertPower client can initiate connections to the
eXpertPower
TM
server on a time basis. For information on configuring
eXpertPower connections, see
Configuring eXpertPower Client
in Chapter 5.
To configure your ETC II modem for dial-out connections:
1.
Set the default Ethernet gateway address to 0.0.0.0 to direct client
connections to the modem network. See
Configuring the Network
in
Chapter 5 for information on programming the Ethernet port in your ETC
II.
2.
Define your service provider’s phone number, the login name and the
password, and select the modem dialing options: the number of redial
attempts, the time between attempts, and the connection timeout. Other
IP connection parameters are automatically negotiated with the remote
server. See
Configuring Dial-Up Connections
in Chapter 5 for
information on configuring the Dial-Up modem.
NOTE:
If your ETC II has both the Ethernet and modem network interfaces, the
eXpertPower client uses one of these for connections to the eXpertPower
TM
server. The default Ethernet network gateway address defines which one of
the networks is used. If the default gateway address is not defined (i.e., it is
set to 0.0.0.0), the ETC II uses the dial-out modem connection via your local
Internet provider. If you defined the default network gateway address, any
call to the IP address, which is not included in the address space of the both
networks, is redirected to the default Ethernet gateway.
Serial Master Connections
The ETC II can also be used as a serial-to-serial or a serial-to-wireless
gateway. This provides connections to slave networks from serial
applications using the COM3 RS-232 or the COM4 RS-422/485 slave port.
To use the COM3 port as a slave port:
1.
Configure the COM3 port communication parameters for your master
application. See
Configuring Serial Ports
in Chapter 5 for information on
programming serial ports.
2.
Ensure that the PROG-RUN switch is in the RUN position.
To use the COM4 port as a slave port:
1.
Configure the COM4 port communication parameters for your master
application. See
Configuring Serial Ports
in Chapter 5 for information on
programming serial ports.
2.
Ensure that the COM4 port direction in the port setup is set to “Slave”.
Routing Messages over Slave Networks
A device address is used to route master requests to a correct network
where the target device is physically located. The device address range is
programmable in the range of 1 through 247. It may be restricted by specific
protocol limitations.
One of the device addresses is reserved for accessing the ETC II
configuration and data registers. The factory-set ETC II network address is
99. It can be moved to another address via the ETC II Gateway Options
setup if you wish to use the default ETC II address for addressing your slave
devices.
The ETC II has two options for routing messages over the slave networks,
depending on whether the device routing table is defined in your ETC II or
not.
The first option uses implicit rules that identify the device location statically
upon the device address. The following table shows how the messages are
routed through the COM4 and COM5 serial ports depending on the port
