Programming tools and control logic - Facility Explorer - LIT-12012045 - Field Device - N2 Controllers

Modernization Guide for N2 Controllers - Facility Explorer

Facility Explorer
Product name
N2 Controllers
Document type
User Guide
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Revision date

CCT is the programming and commissioning tool for the FX-PC controller family, and its control logic capabilities are similar but not identical to those of the legacy N2 controller programming tools (for example, HVACPro and GX Tool). No utilities are available to convert the legacy N2 controller's logic to be usable by CCT, and as a result, you need to recreate the control logic for the replacement FX-PC controller using CCT.

Recreating a UNT, VAV, VMA, or AHU controller application that was programmed with HVACPro should be straightforward. The CCT System Selection Wizard and Sideloop Wizard provide control logic creation capabilities that are nearly identical to HVACPro's Question and Answer (Q&A) wizard and Sideloop wizard.

Figure 1 shows how to begin configuring a new system in the tool. Figure 2 shows the N2 Compatibility Options in the System Selection Tree.

Figure 1. New System

Figure 2. N2 Compatibility Options

Recreating a DX-9100 control application that was programmed with the GX Tool is more challenging. The GX Tool was a custom programming tool which allowed the programmer to create custom control logic by connecting together various predefined logic modules to its I/O. CCT provides a similar custom programming interface using predefined logic modules, but its logic modules are significantly different from the GX Tool's. Also the CCT programming canvas is significantly different from the GX-Tool's. At CCT Release 10.1 a new Global Sequencer logic module was added that provides similar functionality as the GX Tool's Sequencer and Binary Sequencer modules.

The control application programmed by CCT is significantly more advanced, containing modern control advancements such as state-based control, event-driven logic, and automatic tuning.

Note: The N2 Compatibility Options option button does not appear for Central Heating, Central Cooling Plants, and Simple Central Plants because these systems typically use custom logic. For more information on programming and downloading controllers using CCT 10.1, refer to the Controller Tool Help (LIT-12011147).