Omron PLC read write

This is simple Dataplicity Application example allowing read/write data to/from Omron PLC via web browser.

The example demonstrate how to:

monitor simple memory address in graph
write value to PLC

setup address for monitoring and writing

Pre-requisites

Omron Sysmac PLC with Ethernet module.
Linux PC ( raspberry can be too)
Python Omron FINS library (copy is included in this repo)

Setup

Please follow the tutorial on http://dataplicity.com/get-started/raspberry-pi/ to setup a dataplicity account and register a application. Off course use this application instead of sinewave :-)

Application breakdown is here .

Notes about FINS lib

There is two possibility to make FINS: UDP and TCP. There is no difference with one application and one PLC. For multiples apps running on single PC or multiple PLC in network next notes applies for UDP:

UDP not guaranteed reply
UDP can handle multicast too
only one application per PC can make UDP because need to grab 9600 socket. Workaround is use different IP addresses.

References

FINS documentation http://www.omron.com.au/data_pdf/mnu/w343-e1-06_cs1w_cj1w-etn.pdf (chapter 5) The Omron FINS library: https://bitbucket.org/vladimirek/omronlib

Future work

This is exaple for monitoring level in silos: