3.11 Integrator Block; Execution; Figure 12: Integrator Block - Honeywell ST700 User Manual

3.11 Integrator block

The Integrator block integrates a variable as a function of time, and also accumulates the
counts from a Pulse Input block. The block is used as a totalizer that counts up until reset or
as a batch totalizer that has a setpoint, and the integrated or accumulated value is compared
to pre-trip and trip settings. When the pre-trip and trip settings are reached, the block
generates discrete signals. The integrated value can go up, starting from zero, or go down,
starting from the trip value depending on the settings. The block has two flow inputs to
calculate and integrate net flow, which can be used to calculate volume or mass variation in
vessels or as an optimizing tool for flow ratio control. The block does not support process
alarms.
ATTENTION
Alternatively IN_1 and IN_2 can be used as pulse inputs coming from other blocks.
The same general rules for integration applies for the accumulation of pulses.

Execution

The basic function of the Integrator block is to integrate an analog value over time. It can
also accumulate the pulses coming from the Pulse Input block or from other Integrator
blocks. The block is normally used to totalize flow, giving total mass or volume over a
certain time, or totalize power, giving the total energy.
Inputs
The block has two inputs: IN_1 and IN_2. If IN_2 is not connected (does not have a
corresponding link object), calculations for IN_2 can be avoided. Each input can be
configured to receive a measurement per unit of time (rate).
Page 68 FOUNDATION Fieldbus ST 700 Pressure Transmitter User's Guide

Figure 12: Integrator Block

Revision 2.0