Hi Randy,

You have to have a master Profibus DP and a slave Profibus DP [:blush:]

Then the Profibus Slave have to be connected in the Profibus Master HW-projecting.

Don't forget to give all the data you want to exchange between the two systems. A good start is to give one byte output from the master and (of course) one byte input in the slave. Please look out that the addresses are not used in both systems. Then load for both systems the hardware and that must work. [:P]

When that is working then you may expand the dataflow, when you are using 3 or more then 4 byte as one existent dataflow you might have to use SFC14 and SFC15 (with newer CPUs not necessary).

If you have then still trouble, then please place that what you have made until now here on the page, so that i can look to it. [8)]