24 hours of recording at what sample rate? Are you wanting to capture specific events over a 24 hour period, or do you really need to capture 24 hours of continuous data? How do you intend to use/analyze the data?
Yesterday I was looking for more info on data logging using oscilloscopes.
this is piece of article (below) from Textronix web site.
Ways to do each type of data logging
Seamless data logging cannot generally be done on oscilloscopes, because oscilloscopes are inherently triggered devices. If you require seamless data logging, you will need to look at either an analog data logger, or a digitizer instead of an oscilloscope.
Triggered and measurement data logging can be done with an oscilloscope, in conjunction with software that will save the data to a computer. Wavestar, the TekXL toolbar, and SignalExpress will do both types of logging, or you can write a program that will save data over time. Wavestar and SignalExpress can be downloaded from our Software Download section.
I would say that not everything goes smoothly even in middle/high price range.
Judging by this article I would say, I would prefer so-called seamless data logging. Because, in my opinion, it is easier to understand what occured with the signal or how much alterated the signal in the measuring point. Especially if you don't know which event you are expecting.
here is block-diagram (below, made myself) of problem device. As shown there are some points for signal measurement. I would like to add that these devices may work whole day or more with no signal loss, than suddenly become non working and quickly become working. But in order to start again a production process it needs hours. The worth of new device ~1200 Euro.
I still don't know whether issue appearance depends on ambient temperature, load, current consuption, etc. First I need to see somehow that particular device really makes the loss of signal at its RS-485 output. Or when master tells to keep silent the slave device keeps on translation, or there is just distortion of signal.
The next question is where there was a loss and at (before/after) which measur. point. It is so simple in theory.
So I am asking by which way it can be caught that issue.
Also thank you guys for youre replies.