How to program COM connection

Message Topic Search Topic Options Post Reply Create New Topic Printable Version

   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\r", then a value wiill be returned. However, the questions are:
1. we can't define string as "00ms\r".
2. What functions can be used for com communication. We used the code below:
       Open "com1:", channel\Bin; 
      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

Author	Message Topic Search Topic Options Post Reply Create New Topic Printable Version
zli Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 2010-February-08 Online Status: Offline Posts: 3	Quote Reply Topic: How to program COM connection Posted: 2010-February-08 at 21:33
	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\r", then a value wiill be returned. However, the questions are: 1. we can't define string as "00ms\r". 2. What functions can be used for com communication. We used the code below: Open "com1:", channel\Bin; 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

PerSvensson Members Profile Send Private Message Find Members Posts Visit Members Homepage Add to Buddy List Pickmaster members Joined: 2007-January-08 Location: Sweden Online Status: Offline Posts: 282	Quote Reply Posted: 2010-February-09 at 08:26
	Hi Here is what I usally do Open "Com1:", equipment\Bin; 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 "\0D\0A" to the send string
	Per Svensson Robotics and Vision Specialist Consat Engineering

zli Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 2010-February-08 Online Status: Offline Posts: 3	Quote Reply Posted: 2010-February-09 at 18:12
	Hi Per Svensson, Thanks for reply. My sensor needs CR. I put command as "00ms\0D", 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

PerSvensson Members Profile Send Private Message Find Members Posts Visit Members Homepage Add to Buddy List Pickmaster members Joined: 2007-January-08 Location: Sweden Online Status: Offline Posts: 282	Quote Reply Posted: 2010-February-09 at 18:29
	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 ....)
	Per Svensson Robotics and Vision Specialist Consat Engineering

zli Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 2010-February-08 Online Status: Offline Posts: 3	Quote Reply Posted: 2010-February-10 at 15:33
	Hi Per Svensson, We got our sensor working. Cable wiring was not properly set up before. Thanks for your help. Regards, Zack