Modules (CH) - 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

All Central Heating applications use the core logic listed as follows:

Network Inputs

  • SYSTEM-EN (System Enable): This network input enables the heating system via network command or schedule.

  • OA-T (Outdoor Air Temperature): This network input is loaded unless the system has an OA-T sensor.

  • TUNING-RESET: This module is used to reset the tuning parameters to the default values present after the initial application transfer to the device.

See the Network Input Modules section.


  • PMPDOWN-TIME (Pump Down Time): This floating constant (Constant) delays the pump stop command allowing the primary heating equipment to maintain flow after shutdown.

State Generation

  • Hot Water System Enable (System Enable): This module enables and disables other modules based on the SYSTEM-EN and Outdoor Air Temperature values.

  • PID Tuning Reset: This module forces every output controller to reset the Proportional Band and Integral time of every PID to default values based on current process ID.