My personal entry to this problem is that I have a project where differnt parts/machines are supplied with Profibus DP capable S7s. Now I'm presented with the task to let all these parts talk to each other, and all machines have a DP port, so whats the problem ?
What is more natural than to let all CPUs communicate with each other via the built-in DP ports that all the CPUs have ?
In other words, no extra CPs are used, only the built-in DP ports.
Also no DP coupler is used.
The snag is this:
In order to set up communication with PUT and GET (and with the above mentioned constraints) all CPUs must be included in the same STEP7 project .
This is simply not possible. Different vendors cannot put their projects in the same STEP7 project. Its even a hassle when its the same company !
There are lots of projects where different vendors supply S7-300s and S7-400s with their equipment. So I bet I am not alone about this "problem".
I am pondering a possible workaround :
Create separate STEP7 projects for each CPU.
In each project all the other CPUs must be included - but only with dummy programs - only the CPU and comms parameters will have to match.
Paul Lucas has gratitously offered to use his S73152DP + S74122DP for experimenting (clap clap clap clap).
We just have to feed him with instructions.
Are there others out there willing to join the party ?
What is more natural than to let all CPUs communicate with each other via the built-in DP ports that all the CPUs have ?
In other words, no extra CPs are used, only the built-in DP ports.
Also no DP coupler is used.
The snag is this:
In order to set up communication with PUT and GET (and with the above mentioned constraints) all CPUs must be included in the same STEP7 project .
This is simply not possible. Different vendors cannot put their projects in the same STEP7 project. Its even a hassle when its the same company !
There are lots of projects where different vendors supply S7-300s and S7-400s with their equipment. So I bet I am not alone about this "problem".
I am pondering a possible workaround :
Create separate STEP7 projects for each CPU.
In each project all the other CPUs must be included - but only with dummy programs - only the CPU and comms parameters will have to match.
Paul Lucas has gratitously offered to use his S73152DP + S74122DP for experimenting (clap clap clap clap).
We just have to feed him with instructions.
Are there others out there willing to join the party ?