Writing in between daily work activity
Started from the moment when I attended released product conference from one of automation vendor in Jakarta. They showed demos and some presentation related to profinet system and the functionality of profinet which they said it as “next generation” communication protocol based on ethernet. I’m very interested when they showed one of feature from profinet IO i.e exchange data between master CPU PLC with short and flexible way. Why I said that short and flexible way ? Because it just click, configure, and it can be used directly to other station without scripting to buid connection / communication 🙂
By trying a few times, I find how to generate I-Device
Below some requirements which we need :
– Simatic Manager v5.5
– Firmware CPU Profiner v3.2
Firstly, we should know what is functionality of I-Device ?
I-Device or Intelligent IO Device allow data to exchanged with an IO Controller (PLC). I-Device is connected to higher level IO Controller as IO Device or remote IO. Let see this chart :
I-Device has many advantages :
– Simple connection of IO Controller without additional tool
– Real time communication between S7 CPU
– Manage processing of subtask in separate Step7 project
– Lower communication loads by process data locally
– Required computing of the individual CPU or IO Controller can be reduced
Next, directly I want to explain how to create I-Device which steps :
The address of transfer area are preset by HW Config, as usual can be changed by user. In this case, Q 100.0 was specified for the transfer area.
Finally !! just it how to create and use I-Device that can we use to exchange data between CPUs. I-Device is one of many function profinet, other functionality of profinet i.e option handling, device replacement, prioritized startup, docking station, shared device, Isochronous mode, PROFIenergy, web base system, and media redundancy.