How to program COM connection

Robot Controller
1

Dear ALL,

We have a thermo sensor to be connected with robot controller through COM connection. The process is to send a command from robot to sensor, e.g "00ms ", then a value wiill be returned. However, the questions are:

  1. we can’t define string as "00ms ".
  2. What functions can be used for com communication. We used the code below:
    Open “com1:”, channelBin;
    Writeanybin channel, rec; rec := ReadStrBin (channel, 10);
    rec := ReadStrBin (channel, 10);
    Close channel;
    but it didn’t work to get any response from sensor.

Can you please help us with this?

Thanks

Zack

2

Hi
Here is what I usally do

Open “Com1:”, equipmentBin;
ClearIOBuff equipment;
WriteStrBin equipment,command;
stReadValue:=ReadStrBin(equipment,Characters,Time:=WaitT);

haven’t added the declarations of the variables but I guess you will understand anyway

Also do your sensor need CR/LF ? in that case I also would add “DA” to the send string

3

Hi Per Svensson,

Thanks for reply.
My sensor needs CR. I put command as “00msD”, and use your code. Still no response.
I connected sensor with PC. Program with c# to test sensor. Everything works fine to get data from sensor. I am confused about rapid code. How can I check what is wrong.

Regards,

Zack

4

What you can do is to connect your PC to the robot controller to see if you get anything from the controller when you execute the robot program.

Could be

  • Communications settings (but I guess you have check thoose a couple of times allready)
  • Cable wiring (RTS,CTS …)
5

Hi Per Svensson,

We got our sensor working. Cable wiring was not properly set up before. Thanks for your help.

Regards,

Zack