The instantaneous flow rate does not match the cumulative flow rate; the cumulative value is significantly lower
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The current Allen-Bradley MACS 4.6.2 system has been in use, and it was accidentally discovered that the cumulative flow rate does not match the instantaneous flow rate – it is significantly lower! Upon inspection, its configuration is the same as that of other cumulative flow rate modules, with identical parameters. The instantaneous flow rate is consistent with the reading on the on-site instrument. I don’t know why? Please, experts, give me some advice!
That shouldn’t be the case, right? You can conduct your own experiment by forcing this traffic volume to be an integer, such as 100, and then check whether there is any deviation in the cumulative traffic volume over one minute.
It’s usually due to an incorrect setting of the time coefficient; adjusting it should fix the issue
It is necessary to determine whether the cumulative flow matches the instantaneous flow; the cumulative flow is accumulated over a certain period of time, while the instantaneous flow changes constantly. To determine whether they match, the instantaneous flow value must be held constant for a certain amount of time before a judgment can be made. First, use standard instruments to input a standard signal in order to verify that the instantaneous flow rate matches the cumulative flow rate. If there is indeed a discrepancy, check whether the parameter settings are correct, whether the configuration is proper, and whether there are any interferences. If the problem persists, contact the manufacturer for assistance.