Chapter 3 Operating the ETC II
Using the ETC II
14
ETC II Network Communicator
Internet Connections
Starting with V21.5.4, the ETC II provides connections to slave devices that
are linked to the Internet via the Modbus/TCP or DNP3/TCP protocol.
The device routing table is used for assigning the IP addresses to slave
devices. See
Routing Messages over Slave Networks
below for more
information on using the device routing table in the ETC II.
To configure Internet connections for your devices:
1.
In the device routing table, specify the IP addresses for Internet devices
connected to the ETC II. See
Configuring Device Routing Table
in
Chapter 5 for more information.
2.
Enable the routing table in your ETC II via the ETC II Gateway Options
Setup (see
Configuring Gateway Options
in Chapter 5).
Master Network Connections
Internet Connections
The ETC II provides a TCP server for master client connections on one of
the standard TCP ports: 502 (Modbus/TCP), 20000 (DNP3/TCP) or 5002
(SATEC ASCII/TCP). The TCP server supports eight simultaneous client
connections.
NOTE:
Starting with V21.5.4, the ETC II provides the permanent Modbus/TCP
server on port 502. Selecting the TCP service port in the ETC II (see
Configuring the Network
in Chapter 5) launches an additional server either
on the DNP3/TCP port 20000, or on the SATEC ASCII/TCP port 5002,
allowing simultaneous connections on both ports.
The TCP server can be accessed via a local Ethernet network or via a Dial-
up PPP Internet connection using an embedded 56K modem.
The ETC II Dial-up port is programmable either for dial-in connections from a
remote TCP client via Windows Dial-Up Networking services, or for dial-out
connections to a remote TCP server via a local Internet Service Provider
(ISP).
Ethernet Connections
To setup your Ethernet connections:
1.
Define the network IP parameters via the ETC II Network Setup. If you
use the ETC II eXpertPower client connections via the Ethernet
network, define a non-zero default gateway address, so the client
connections will be directed to the Ethernet network (see Note in “Dial-
Out Connections” below).
2.
Define the TCP service port number for your application protocol.
See
Configuring the Network
in Chapter 5 for information on programming
the TCP service port in your ETC II.
Dial-In Connections
To set up your dial-in connections, define the IP parameters for the modem
interface: the IP address, subnet mask and default network gateway, and the
number of rings before answering an incoming call.
See
Configuring Dial-Up Connections
in Chapter 5 for more information on
configuring your modem. See
Dial-Up Networking
in Chapter 4 for
information on using Windows Dial-Up Networking for dial-in connections.
