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Microblock families

Microblock family

Description

I/O Points

I/O (Input/Output) Points microblocks are used to communicate values between a control program and the physical inputs and outputs of a control module. Input values are read from sensors connected to the physical inputs on the control module. Output values are sent from the physical outputs of a control module to control components on the controlled equipment. These microblocks communicate using the BACnet protocol.

The airflow and sensor zone control microblocks belong to this microblock family.

These microblocks can be made visible to, and commandable from, the BACnet network.

Network I/O

Network I/O microblocks are used to pass information between control modules on the network. The values they pass may be read from or written to any BACnet object properties and points with other supported protocols.

Display

Display microblocks allow WebCTRL to communicate directly with BACnet objects in other vendor's equipment. They exist solely in the WebCTRL database and can be used to display and modify the status of BACnet objects in other vendor's equipment. They can be referenced on WebCTRL graphics, allowing any vendor's BACnet equipment to be integrated into the WebCTRL user interface.

Display microblocks differ from other microblocks in that:

  • They are not downloaded into a control module.
  • They cannot be used in a control program's control logic, although they can be the source of WebCTRL alarms that alert users to out-of-normal conditions.
  • They have no input or output wires.
  • A single microblock can read or write multiple properties.

 

SysIn

SysIn microblocks receive heat and cool requests, as well as other system information, editable properties, or constants used as input values to a control program.

SysOut

SysOut microblocks are used for output values from a control program, such as heat and cool requests or other status information, optionally exposed to other BACnet devices.

Log

Log microblocks record system values, such as trends, alarms, and runtime values.

Control

Control microblocks output signals that are used for control and scheduling purposes. Many of these microblocks generate colors, which WebCTRL uses to communicate control program status.

Convert

Convert microblocks take information from other microblocks, change it in some way, then output the modified data.

Limit

Limit microblocks accept signals from other microblocks, limit the value in some way, and then output the modified signal.

Relay

Relay microblocks accept input signals from other microblocks, then act as a software relay to determine how and when the output signal should be modified and sent out from the control program.

Logic

Logic microblocks perform logical operations on signals received from other microblocks. Often these microblocks are used to determine conditions that trigger equipment starts, stops, or alarms. These microblocks accept only digital inputs and produce on or off (digital) signals.

Math 1

Math 1 microblocks perform simple mathematical operations on values from other microblocks.

Math 2

Math 2 microblocks perform advanced and trigonometric mathematical operations on values from other microblocks.

Misc

Misc microblocks include:

  • DO/DI Proof
  • Up/Down Counter
  • Text
  • Version
  • Sunrise/Sunset
  • OCL (Operator's Control Language)