Contec COM-2DL-PCI, User Manual, Page: 35 / 62

2. Setup
28
COM-2PD(PCI)H, COM-4PD(PCI)H
Step 4 Checking Operations with the Diagnosis
Program
Use the diagnosis program to check that the board and driver software work normally, thereby you can
confirm that they have been set up correctly.
What is the Diagnosis Program?
These programs perform some simple checks on the board operation. Two programs are provided.
Terminal program (CTstCom.exe)
Data entered from the keyboard is sent directly from the port. The function of the program is equivalent
to the Hyper Terminal program provided with Windows.
Serial Communications Diagnostic Program (CommChk.exe)
Performs actual communications and indicates whether the results are correct or not (error).
The following describes the procedure for testing using the serial communications diagnostic program
(CommChk.exe).
Check Method
Obtain an RS-422A/485 cross cable. If you do not have a cross cable, you can use a switch on the board
to perform testing of a single COM port using loopback communications. See the figure below for the
switch settings.
Switch setting for using a cross cable
ON
1
3
2 4
5
6
COM-2PD(PCI)H: SW3, 5
COM-4PD(PCI)H: SW3, 5, 7, 9
Switch settings for using loopback communications (without a cross cable)
ON
1
3
2 4
5
6
COM-2PD(PCI)H: SW3, 5
COM-4PD(PCI)H: SW3, 5, 7, 9