×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

compactlogix L32E Serial port CH0 problems

compactlogix L32E Serial port CH0 problems

compactlogix L32E Serial port CH0 problems

(OP)
I have a device that i need to communicate to that only has TX, RX, and Gnd.

I have to send one character to the device, and then receive it's reply which could be 400-500 bytes.

I am able to send characters.
But I don't think that i have ever received them.
I'm using AWA commands.

I have verified that the device is working when i connect to my PC and use Hyperterminal.

9600,N,8,1
No Handshake, have tried Half and Full Duplex.
Have tried with and without Termination and Append characters.

Have tried with AWA and AWT commands.

RE: compactlogix L32E Serial port CH0 problems

Try the ARL instruction and use the terminating characters to determine the length of the read

RE: compactlogix L32E Serial port CH0 problems

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources