The L9P_TOTAL DFB provides a material totalizer for batch processing reagents. The input signal contains the units of weight or volume per unit of time. The totalizer integrates the input over time.

The target set point is for the full amount to be metered in. Here the output will be turned OFF.

The trickle flow set point is the cut-off point when the output should be decreased from full flow to a percentage of full flow so that the target set point is reached with better granularity.

The auxiliary trickle flow set point is optional. It is used to gain another level of granularity. If this set point is enabled, the output is reduced further to 10% of the trickle output.

The totalizer works from zero as a base point. The set point must be a positive value

In normal operation, the valve output is set to 100% flow when the integrated value is below the trickle flow set point. When the sum crosses the trickle flow set point, the valve flow becomes a programmable percentage of full flow. When the sum reaches the desired target set point, the valve output is set to 0% flow.

Set points can be relative or absolute. With a relative set point, the deviation between the last summation and the set point is used. Otherwise, the summation is used in absolute comparison to the set point.

There is a halt option to stop the system from integrating.

When the operation has finished, the output summation is retained for future use. You have the option of clearing this sum. In some applications, it is important to save the sum, e.g. if the meters or load cells cannot handle the full batch in one charge and measurements are split up or if there are several tanks to fill for a batch and you want to keep track of batch and production sums.