Event driven read

[James_R_Talich]

I have 20 events that I am monitoring in a power relay cabinet. If a problem is detected a trip signal is sent to the power source. Loss of power due to the trip signal introduces several additional problem indications. I would like to be able to determine the first event but because the polling rate for the i/o input node is 1000 milliseconds (I believe Pac Control uses 250msec). I am trying to use the i/o read node with a 0.2sec polling rate and change node. (0.1sec on 20 reads seems to clog the system)
Is there an implementation based on an interrupt instead of polling?

[philip]

UDP streaming will get you there.

Fastest way to retrieve data from OPTO22

This is the area on a PR1 to enable the streaming: [image] Set index 4 to 1 to enable, 0 to disable the stream. Index 5 is the interval in milliseconds. Index 6 is the UDP port to stream to Index 8 is the IP address of the system you are streaming to, each octet of the IP uses a byte of the value. Default is to stream every IO channel possible, which is 2,308 bytes on the PR1 - this can be optimized by setting up the custom configuration area for the addresses you need and setting the str…

(Very) fast way to read digital inputs via UDP streaming using ONLY Node-RED

Thanks to a post in an earlier thread by @philip (link) I have been testing UDP streaming of digital channels, but focusing on using just Node-RED, rather than groov Manage and Python. This approach is entirely based around the OptoMMP endpoints for streaming configuration that’s fully explained under “Streaming Configuration–Read/Write” in “Appendix A” of the Opto22 - 1465 OptoMMP Protocol Guide The specific address is 0xF03FFFC0, and uses the 10 32-bit integers that follow to configure diffe…

[James_R_Talich]

Thanks for this information!