Re: AS400 - Profinet - OPC_UA

Hello Fulvio,

Am 19.04.2022 um 15:08 schrieb Fulvio Biagini - Gmail <fulvio.biagini@xxxxxxxxx>:

Good morning I need to read / write data on a Siemens PLC using Profinet or OPC-UA directly from AS400. I have already used ModBus for other systems, but never Profinet or OPC-UA. Has anyone faced the problem yet? Do you have any RPG examples? Thank you very much! Fulvio Biagini

Hmm.

https://en.wikipedia.org/wiki/Profinet

https://en.wikipedia.org/wiki/OPC_Unified_Architecture

Profinet is apparently more or less standard Ethernet, with the "usual suspects" on top, such as TCP/IP. Even OPC UA seems to be standardized as either being transported as a webservice (SOAP), or directly via TCP.

The descriptions of both topics read very abstract, just like IBM "architectured" stuff does.

I highly doubt there is publicly available, readymade RPG code available.

Scott Klement has done a RPG IV Socket Tutorial:

https://www.scottklement.com/rpg/socktut/tutorial.html

Personally, I'd opt to port existing C code from elsewhere to IBM i instead of reinvent the wheel with RPG. Note that this is not a simple "copy; make; make install", due to how compilers are implemented on IBM i.

Please ask detailed questions via the C400-L on Midrange.com.

In fact, I consider to port libmodbus to an old version of OS/400 I use for gathering stats from my solar power inverter: https://travis-ci.org/stephane/libmodbus

:wq! PoC