hpsustar
Member
I have been working on a project recently to control a PowerFlex525 drive using a SLC 505. By control I mean controlling the starting, stopping, frequency output, etc. of the drive using this SLC 505. I have written programs before to control this kind of VFD using ControlLogix and CompactLogix but never a SLC.
Through some research I have read that there are a couple different ways to go about this and I am just trying to figure out the practical and theoretical differences between the two. When is it better to use EEM instructions and when is it better to use the MSG instruction and are there pros and cons to using one over the other? What is the difference in using these two different msg types?
I ended up getting the program to work using MSG instructions and the N41 and N42 data files but still am very interested in the differences and pros and cons in using the EEM instructions and when that should be done instead of MSG instructions.
Through some research I have read that there are a couple different ways to go about this and I am just trying to figure out the practical and theoretical differences between the two. When is it better to use EEM instructions and when is it better to use the MSG instruction and are there pros and cons to using one over the other? What is the difference in using these two different msg types?
I ended up getting the program to work using MSG instructions and the N41 and N42 data files but still am very interested in the differences and pros and cons in using the EEM instructions and when that should be done instead of MSG instructions.