The Plant Sequencing-Modulating module is responsible for sequencing pumps, interlocks, and stages of modulating plant equipment to maintain a setpoint. This module accepts as inputs a process variable, a stageup setpoint, a number of stages running, an Up Delay, a Down Delay, a System Interlock Status, a Stabilize Delay, a Start-Up Delay, and a System Enable. Based on the input commands and the attribute settings, the module outputs a state for sequencing pumps, interlocks, and stages of modulating plant equipment and an output for the number of devices to run. This module provides an output for a stagedown setpoint that is calculated based on the number of devices running.
You can view and modify the modules in this group’s logic.