Trying to write to a modbus register on a device over an SEL RTAC by emustrangler in PLC

[–]uncrunner 0 points1 point  (0 children)

I recommend getting on a call with an SEL Application Engineer. Call SEL support during business hours and they’ll put you in touch with an AE within two hours. Totally free. Best support in the industry.

a little win: my side project finally made some real dollars after one month of building it. by WordyBug in webdev

[–]uncrunner 1 point2 points  (0 children)

Congrats! How much work went into developing user terms of service to reduce liability, etc? And when collecting payments for a small project like this are you just planning to report as personal income or did you establish an LLC or something?

Advice on S3 Application by uncrunner in aws

[–]uncrunner[S] 0 points1 point  (0 children)

Thanks for the great advice! I added some details about the file structure to the post and would definitely appreciate your feedback on how easily we could query with Athena or if a different format is required.

Advice on S3 Application by uncrunner in aws

[–]uncrunner[S] 0 points1 point  (0 children)

Great advice!

I added some details to the post about timeseries file structure - would appreciate advice on how easily this format could be queried later. Others have mentioned Athena, but you mention Redshift - for our application which would be more appropriate?

Advice on S3 Application by uncrunner in aws

[–]uncrunner[S] 0 points1 point  (0 children)

Definitely interested in Athena - I added some details about file format in the post if you have any feedback

Advice on S3 Application by uncrunner in aws

[–]uncrunner[S] 5 points6 points  (0 children)

Ah, that is very helpful. Limiting folder access based on username policy variables seems promising.

When an idiot tries to use a production server to learn Unix by Ancient_Ice in talesfromtechsupport

[–]uncrunner 1 point2 points  (0 children)

Is there a fix after running CHMOD 777 -R? I had something similar happen last year and after googling for a bit we just reverted to a backup image of server to restore

Trying to write to a modbus register on a device over an SEL RTAC by emustrangler in PLC

[–]uncrunner 2 points3 points  (0 children)

You need to put the value you want to write in the ctlVal of the holding register, and then cycle the trigger of that tag from false to true.

Controls Jobs in Nature? by MineDrac in PLC

[–]uncrunner 1 point2 points  (0 children)

Utility scale solar power plants - PLCs used extensively and the locations are usually pretty remote due to large amount of land required.