The Zone Controller controls AHU temperature, pressure, CO2 and humidity of supply air. These control functions can be individually enabled as part of the configuration. The method and parameters for the individual controllers are also configurable.
The operation of the Zone Controller is configured using a web browser. The following groups of data can be configured:
• Active controllers
• System control options for purging, fire, manual overrides from BMS, etc.
• Schedule of operation
• Control parameters for temperature, pressure, CO2 and humidity
• Simulation parameters
• Valid data points and data point properties
The points list allows the linking of sensors, actuators and digital I/O to physical I/O lines.
A log file is maintained which captures all major system operational events and their time.
The values of all data points are captured in a time series database both synchronously and on change of value. The web browser is then capable of displaying the trends of selected data points. The display tool is configurable and the user may define the number of graphs, the number of variables per graph and the display settings of the trend graphs.
It is possible to simulate a number of sensor and digital input data points. The data profile can be configured as a step, square wave, etc., the frequency and amplitude are also configurable.
MLM Diffuser Interface
The Zone Controller implements a BACnet/IP interface to interrogate the diffuser network. The diffuser network information is accessed through a Master Communications Unit (MCU). The Zone Controller can then read and write points like temperature, disk position and occupancy status information in the Supply Area.