Hi everyone. So, as I told first time I got here I'm a newbie in PLC programming so please be patient.
Here's the thing. For testing a device we make, I have to connect two identical S7-1200 CPUs via Profibus DP. Now, setting up the project was easy, just add the devices, the communication modules master and slave and then link the slave to the master.
The problem is when I go in the MainOB of the master and create a GET instruction in the properties section I can select the master, but not the slave! Or at least not via Profibus, only Profinet. Before getting on with memory and all the rest, why can't I see the slave even if it's connected and has a adress?
Attached a pic of the GET properties section.
Thank you!
Here's the thing. For testing a device we make, I have to connect two identical S7-1200 CPUs via Profibus DP. Now, setting up the project was easy, just add the devices, the communication modules master and slave and then link the slave to the master.
The problem is when I go in the MainOB of the master and create a GET instruction in the properties section I can select the master, but not the slave! Or at least not via Profibus, only Profinet. Before getting on with memory and all the rest, why can't I see the slave even if it's connected and has a adress?
Attached a pic of the GET properties section.
Thank you!