Comtrol DM ATS-XPe - Manual (Page 33)

PC104 RocketPort Option 33
Troubleshooting Serial Ports
Troubleshooting Serial Ports
The following subsections discuss the following utilities that are installed on the
ATS-XPE:
• Test Terminal program (wcom32.exe), which can be used to troubleshoot
communications on a port-by-port basis.
• Port Monitor program (portmon.exe), which checks for errors, modem control,
and status signals (
Using Port Monitor on Page 35). In addition, it provides
you with raw byte input and output counts.
• Peer Tracer program (peer.exe), which traces driver events ( Using Peer Tracer
on Page 40).
Using Test Terminal WCOM32 is a terminal program that enables you to open a port, send characters
and commands to the port, and toggle the control signals.
Note: WCOM32 will not work on ports used by RRAS if Remote Access Service
is running or any other application is using the port.
If you have started RRAS service on any of the ports you want to test, you
must stop RRAS on those ports before starting WCOM32. To test ports that
are not used by RRAS, you do not need to stop RRAS.
Follow these steps:
1. To start
WCOM32, select
Test Terminal
from the Comtrol
program group.
The program
window displays:
2. Select Open Port
from the Port
menu. A list of
possible COM
port numbers displays.
3. Select the COM port you want to test.
If the COM port does not exist or if it is currently being used by another
program, a Create File Error message displays.
If the COM port is
available, a terminal
window pops up:
Note: Notice the <loop>
button in the
terminal window.
If this option is
activated, it is
green and
uppercase (
),
the COM port
internal loopback
feature is activated,
and the data is
returned by the
COM port hardware. If this option is deactivated, it is gray and
lowercase (
), the internal loopback is deactivated, and the data is
sent out the COM port.