ICP DAS USA M-4132 User Manual page 57

Step 4: Here we use Send232 Application (the user can download
Send232 from http://ftp.icpdas.com/pub/cd/8000cd/napdos
/7188e/tcp/pcdiag/source/send232.vb6_2.0.1) to test VxComm
communication. Please open 2 Send232 Applications. One uses
Com1 (connect with M-4132 Client), the other uses Com2
(provide by VxComm driver). When the user clicks "Send"
button to send the message, the receive text box of the other
will show the message.
Figure 62: Communication test
M-4132 User Manual (Version 1.60, May/2014) PAGE：57