vangough

Is this Power Vision or Visionscape ? I assume it is not the Acuity IVS product since it is PC based

I need a little help. I am trying to communicate with a Keyence KV-40 PLC from Visual Basic. Ideally I would like to read some data memories and I/O status back to VB. I have read some of the other posts below and read the manual and will be the first to admit that it shouldn't be that difficult. However, I have tried using a terminal program with my protocol analyzer as well as programming a very simple querry in VB (asking the plc what mode it is in ?M i think) and if I get any response back from the PLC at all I get E1 which means that it didn't like the format of my request. I am sending the following at 9600,8,n,1 Send Break send CR followed by carrage return send ?M or any other command from the book followed by carrage return send CQ followed by carriage return I asked my keyence rep if he had any example code for VB to communicate with the KV but he has been unable to find anything other than the old quickbasic example in the book. Obviously I am missing something simple or doing something stupid here, does anyone have an example of how to talk to this thing with VB that they would be willing to share with me so that I can figure out what I am doing wrong here. Thanks Van Gough vangough@aol.com