How do I specify different sample rates for 4 turbidimeters?

[msezda]

Avi,

Thanks, I'll give that a try. My other option, as someone suggested above, is to simply record the samples at the same rate for all four turbidimeters, and then set up a query to pull out the data I need. In the long run, that may be the simpler solution, but I am anxious to try your suggestion.

TTYL,

Allen

[Khalid]

Hi Allen,

Sorry for the delayed response.  I looked at your process files briefly.  You are not using Modbus Object (sorry for bringing this up in my earlier post).  You are using a single ASCII object to poll all the 4 meters.  There's also provision to poll single meters, on demand. 

When you're doing an Auto Poll, it appears, you really are polling each meter in succession (using the Poll2Address_Counter). 

I am pretty sure the program can be modified to poll only 3 meters normally, and additionally the 4th one at regular intervals.  It'll just take some amount of time -- which I do not have much of these days, unfortunately.  I will not promise, but will try to look into this (as my Boxing day project eh?  )

Meanwhile, you will want to go ahead with whatever you had planned as the workaround. 

Thanks,

-Khalid

PS:  "Bonjour.. Jetravail avec desordinateur.."  That's really all that I learned to say in French