Issuing Commands to Stepper Motor

Hey guys,

I want to issue serial commands to an RMS technologies R256 Stepper Motor Controller through Matlab2012a, Win 7 64-bit. I am not familiar with matlab serial interface. This is what I've tried thus far...

s = serial('COM5') <---that's the correct port
set(s, 'BaudRate', 9600)
fopen(s)

afterwards, I tried issuing commands with:

fwrite(s,'commandhere')

but I am getting no error or motor response. Here is a link to the R256 manual with commands.

http://www.rmsmotion.com/resources/IMC17%20and%20R256%20commands_v1_13_651928.pdf

Any help would be greatly appreciated.

Answer 1

[Walter Roberson]

You probably have forgotten to send the CR (carriage return) as part of the command. Also, be sure to configure the serial port to use CR as the line delimiter.

[MrCurious44]

You were absolutely right. I dug up some more and solved it by the following:

s=serial('COM5','BaudRate',9600) fopen(s) fwrite(s, ['insertcommandhere' 13 10])

Solution found here:http://www.mathworks.com/matlabcentral/newsreader/view_thread/270865 Hope this helps anyone else with a similar problem.

Thanks Walter