Revver
Member
Hi all
I am having trouble with Profibus master/slave comms, i have 2 x 315PN/DP cpu's that i have configured as master and slave. I have set the ports to DP, with node 2 master, node 3 slave. In the properties i have set the input & output fields to both be 6. I have put the configured cpu in the Profibus network in the master configuration and i have coupled it. All downloads ok with no errors.
I have configured a small program to prove communications where i trigger an input in the master to set Q6.0 in the master, this sets I6.0 in the slave which then triggers a local output in the slave which works fine. I also use I6.0 to trigger Q6.0 in the slave which should then set I6.0 in the master to set another local output.The input does not trigger, it seems that i am only getting comms from the master to the slave but nothing from slave to master.
I know i can use Profinet to do this faster but i want to prove the profibus comms
Can anyone help please!!
I am having trouble with Profibus master/slave comms, i have 2 x 315PN/DP cpu's that i have configured as master and slave. I have set the ports to DP, with node 2 master, node 3 slave. In the properties i have set the input & output fields to both be 6. I have put the configured cpu in the Profibus network in the master configuration and i have coupled it. All downloads ok with no errors.
I have configured a small program to prove communications where i trigger an input in the master to set Q6.0 in the master, this sets I6.0 in the slave which then triggers a local output in the slave which works fine. I also use I6.0 to trigger Q6.0 in the slave which should then set I6.0 in the master to set another local output.The input does not trigger, it seems that i am only getting comms from the master to the slave but nothing from slave to master.
I know i can use Profinet to do this faster but i want to prove the profibus comms
Can anyone help please!!