Internet PLC Forum

Has any one tried LibertyBasic to communicate with any type of PLC from trilogi?
Communication seems to only work with Qbasic.
When I use the same code in LibertyBasic PLC does not respond.

Yes i do give some wait time before looking at input.
Yes there is a command send out on the comm port. This is confirmed with other laptop and serial debug software.
So whay does this PLC "T44H-pnp" does not respond to the command chr$(5) or any other? The feedback is suppose to be an echo of what is sent.

Here is the code

[opencom]
    open  "com1:9600,n,8,1,ds0,cs0,rs" for random as #1

[sendwakeup]
    print "com 1 opened."
    print #1,chr$(5)
    timer 200, [timedown]
    wait
[ri]
    a$ = input$(#1,1)
    print "Feedback is >";a$
    close #1
    print "file is closed."
    end
[timedown]
timer 0
goto [ri]