Heating Proportional Valve with Low Limit v51 - Johnson Controls - Metasys - LIT-12011147 - Software Application - Controller Configuration Tool - 15.0

Controller Tool Help

Johnson Controls
Product name
Controller Configuration Tool
Document type
User Guide
Document number
Revision date
Important: As of Release 5.1, the Heating Proportional Valve with Low Limit v51 module replaces the Heating Proportional Valve with Low Limit v50 module.

The Heating Proportional Valve Output Module controls a proportional valve for either preheat or reheat. The module can be configured for DA-T, RA-T, ZA-T, or PH-T control. The module has been designed with temperature control, low limit control, and protection modes such as Low OA Temperature based on OA Temperature. In addition to the proportional valve, this module is also designed to control a circulating pump. This module incorporates tracking the overridden value of the actual output object (AO, PAO). The module resets the PIDs to default tuning parameters if the Reset PID Tuning input is not Normal.

This module provides a second output that incorporates lead compensation to control devices. This function attempts to remove some of the dynamics of the control loop. This process results in forward-looking predictions and speeds up controller responses. The effect is similar to adding derivative action to the controller. Lead compensation is incorporated into most zone temperature control processes where oversized or nonlinear valves might be applied. For more information on the Lead Compensator block, see Lead Compensator in the Control category of the Logic section.

You can view and modify the modules in this group’s logic.