BACnet Communication Driver

BACnet Communication Driver is intended for data connection between Reliance's runtime software and devices communicating via the BACnet/IP protocol (ASHRAE Data Communication Protocol for Building Automation and Control Networks). The driver implements basic services for reading and writing data.

Supported services

ReadPropertyMultiple
WriteProperty
TimeSynchronization

Supported objects

Analog Input
Analog Output
Analog Value
Binary Input
Binary Output
Binary Value
Multi-state Input
Multi-state Output
Multi-state Value
Loop
Device
Schedule

Supported Reliance versions

The communication driver is supported in both Reliance 5 and Reliance 4.

Starting up the driver

The communication driver is a DLL loaded into memory by the Reliance 4 Driver Server program, which can be launched either as a Windows service at Windows startup or as a standard application at the start of a visualization project. Information required to make a connection with devices is read from the visualization project. After reading this information, communication to all connected devices is activated.

Supported properties of BACnet objects

Object-identifier, object-name, object-type, present-value, description, device-type, status-flags, event-state, reliability, out-of-service, update-interval, units, min-pres-value, max-pres-value, resolution, relinguish-default, cov-increment, time-delay, notification-class, high-limit, low-limit, deadband, limit-enable, event-enable, acked-transitions, notify-type, profile-name, output-units, controlled-varible-value, controlled-variable-units, setpoint, action, proportional-constant, proportional-constant-units, integral-constant, integral-constant-units, derivative-constant, derivative-constant-units, bias, maximum-output, minimum-output, priority-for-writing, number-of-states, polarity, inactive-text, active-text, change-of-state-time, change-of-state-count, time-of-state-count-reset, elapsed-active-time, time-of-active-time-reset, minimum-off-time, minimum-on-time, feedback-value, system-status, vendor-name, vendor-identifier, model-name, firmware-revision, application-software-version, location, protocol-version, protocol-revision, protocol-services-supported, protocol-object-type-supported, object-list.

The communication driver does not support segmentation.