CompactLogix -Fastest Datalog rate to SD Card

skyfox

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1769-L24ER-QB1B CPU / RsLogix 5k V20

Does anyone know the fastest rate data (Float Register data) can be log to the SD card? Can it be done at 10ms intervals?
 
1769-L24ER-QB1B CPU / RsLogix 5k V20

Does anyone know the fastest rate data (Float Register data) can be log to the SD card? Can it be done at 10ms intervals?

I don't know the answer, but I can't think why it couldn't, the hardware (SD transfer rate) is fast enough.

It's been a while since I looked at data-logging to SD, but seem to remember the sample-code routines were "verbose", but worked.

Is this a continuous log-file, or one that is periodic (comes in bursts). If it is periodic, you can always buffer the data in the PLC and write to SD at your leisure.
 

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