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JEMWare Meter Configuration Software
Serial Port 2 (RS-232 / RS-485):
A second serial port is available as an optional
―Dual Communications‖ feature. To configure
the meter‘s serial data interface, open the Serial
Communications menu and select the
Modem/Serial2 page. Click on the RS-232/485
button and then select Settings.
Use the pull-down menu to choose the baud rate
that you want to use for communicating with the
meter. The Protocol Type should be set for
Binary unless you are using the port for ANSI Tables,
DNP 3.0, or Modbus (see Protocols menu).
Click the Details button to configure the following
parameters:
Network Address
Password Timeout
TX Start Delay / TX End Delay / Turnaround Delay
Refer to the previous section ―Serial Port 1‖ for a
complete explanation of these parameters.
Ethernet Option
The Ethernet option allows users to communicate serially with the JEMStar meter over a
typical Ethernet LAN. It supports up to four simultaneous connections, which are treated
as virtual serial channels. Any serial command protocol installed in the JEMStar may be
used over one or more of these virtual connections.
The Ethernet option consists of a JEMStar comm option board and Ethernet pigtail cable.
The board installs in the comm option position within the JEMStar and the pigtail runs
from that position out through the base of the meter to a standard RJ-45 Ethernet jack.
(For Switchboard models; Ethernet connections are on the terminal block.)
The Ethernet interface is compatible with any 10Base-T Ethernet network that transports
TCP/IP packets. It also works on 100Base-T networks that can accept 10-megabit
connections.
Terminology
Some computer networking terms that are defined here:
10Base-T: A standard Ethernet physical interface that uses unshielded twisted
pair (UTP) wiring. 10Base-T can carry up to 10 megabits of data per second
although most devices cannot sustain that rate except in short bursts.
IP Address (Internet Protocol): The numeric address of a device on a TCP/IP
network. An IP address is usually expressed as four numbers separated by dots
(periods), such as 192.168.1.2. An IP address can be assigned to a network device
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