Hello,
I am using step7 v5.5 and wincc flex 2008. I have created my PLC program have it working, but I am having trouble with my communications between the HMI and PLC.
The connections are made with Profibus, with terminating resistors turned on at both ends. The original connection was setup on a MPI network.
PLC = MPI node 2 (187k)
HMI = MPI node 3 (187k)
HMI is setup to MPI node 3 (187k)
I can see both nodes on display accessible nodes. I have updated my HMI and can download to it with no problems.
Wincc has picked my PLC tags through the program and signals a connection on the transfer screen.
Now when I am running my project none of my links on my HMI work with my PLC, most of my links are db links, but I have tried memory bits and direct outputs as well as input and have no communications between the PLC and HMI it seems.
I was hoping someone could help me out with my troubles and point me in the right direction in correcting my problem.
I tried setting up the HMI to a Profibus network with the PLC being node 2 and HMI node 3 at 1.5M, as well as changing my HMI settings to match, but I cannot connect to the HMI to download then.
I use to program Siemens quite a bit, but it has been a longtime. Any help would be appreciated!!!
I am using step7 v5.5 and wincc flex 2008. I have created my PLC program have it working, but I am having trouble with my communications between the HMI and PLC.
The connections are made with Profibus, with terminating resistors turned on at both ends. The original connection was setup on a MPI network.
PLC = MPI node 2 (187k)
HMI = MPI node 3 (187k)
HMI is setup to MPI node 3 (187k)
I can see both nodes on display accessible nodes. I have updated my HMI and can download to it with no problems.
Wincc has picked my PLC tags through the program and signals a connection on the transfer screen.
Now when I am running my project none of my links on my HMI work with my PLC, most of my links are db links, but I have tried memory bits and direct outputs as well as input and have no communications between the PLC and HMI it seems.
I was hoping someone could help me out with my troubles and point me in the right direction in correcting my problem.
I tried setting up the HMI to a Profibus network with the PLC being node 2 and HMI node 3 at 1.5M, as well as changing my HMI settings to match, but I cannot connect to the HMI to download then.
I use to program Siemens quite a bit, but it has been a longtime. Any help would be appreciated!!!