ruisebastiao/dpexamples

Dataplicity examples

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 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: