Hi @chi, thank you for the information.I will give it a try.
I do have an old backup and know the addreses and datatypes where data is coming from. dbx.... but i cant modify any of the plc programing. Is there a setting i should check in the PLC to see if the connection will be posible before purchasing the adapter?
In theory the MPI adress or baud rate could have been changed from the default. But if you can connect with the programming software, the MPI to Ethernet will work with the same settings.
You would need to view the tag config, and see if it is allowed for HMI, and if it is enabled for read only, or read/write.
You have to have access to the code to see this.
But also, on the S7-1x00 series PLCs, you CAN do OPC UA, but the 12xx, and the 15xx redundant/high availabilities, the programmer has to use the SiOME tool to get the OPC tags to be "usable" (IE actually use the tag names), so if you didn't have the integrator set any of this kind of thing up, you are kind of SOL.
Even the older S7 Comms version, which requires unoptimized datablocks, still has to be configured in the PLC to send the data out onto the network.
You really can't monitor much if the program isn't configured to send data out to the network.
And while, yes, the PREFERED Siemens TCP/IP protocol is Profi, they can do most TCP/IP protocols, which is actually how you would connect to them, as Profi does NOT like being routed through switches not specifically built to route the packets.
But also, Ignition has no NEED to directly talk Profi, unless you want to directly integrate to something like a Profi VFD, as I don't know of many that support multiple comm types.