Emerson MONITORING OpenComms - Manual (Page 13)

Installation
7
Accessing the Configuration Port
What you will need:
• PC capable of running a terminal emulation application, such as
Microsoft Windows® HyperTerminal®.
• DB9 Null modem or file transfer cable. (The correct cable will have
at a minimum, pins 2 and 3 crossed at the ends.) Null modem
cables are commonly found in computers stores and may also be
referred to as a file transfer cable.
Figure 3 Null modem cable diagram
1. Launch HyperTerminal. When you see the
screen at right, select Cancel.
2. Select the disconnect icon from the menu bar.
This step ensures that you will be able to
modify the configuration settings.
3. Go to File > Properties to make
configuration changes. Under the Connect
To setting, choose the appropriate communications port for your
computer. Generally this is Com 1.
4. Select the Configure button
and adjust the terminal
communication settings to:
• Bits per second: 9600
• Data Bits: 8
• Parity: None
• Stop Bit: 1
• Flow Control: None
• Select OK to close both win-
dows.
5. After the communication
settings are adjusted, press
NOTE
Turn off the power management on your PC or laptop to ensure
that the communications port will not “go to sleep” during the
configuration process.
Null Connection
DTE Device
Receive Rx (pin2)
Transmit Tx (pin3)
DTE Device
Receive Rx (pin2)
Transmit Tx (pin3)