BACnetMasterSlaveNetwork

The BACnetMasterSlaveNetwork is the main component responsible for the communication between a master device and slave devices by the BACnet MS/TP protocol, using the RS485 port (COM1). The BACnetMasterSlaveNetwork sets parameters such as slave devices Id, communication parameters (such as a poll frequency or maximum write time), and reads the status of slave devices. The component has to be placed under the Drivers folder.

The BACnetMasterSlaveNetwork component has the following slots:

• Status: shows the point’s status;

• Fault Cause: shows the fault cause description;

• Enable: enables or disables the network (true: enabled, false: disabled);

• Slave1DeviceId-Slave5DeviceId: allow to set the BACnet Ids of slave devices;

• Slave Status1-Slave Status5: reads statuses of slave devices;

• Poll Frequency: allows to set the polling frequency of all read-only points, min. 1;

• Max Write Time: allows to set the maximum time between sending values of all writeable points–if the value equals 0, values of writable points are sent only “on value change”;

• Ping Frequency: allows to set the time between testing messages to check slave devices connection, min. 1;

• Ping Trigger: triggers the Ping action on the rising edge of value;

• Free Points: shows the number of free BACnet Master-Slave points.

The BACnetMasterSlaveNetwork component offers the following action, available in the context menu:

• Ping: sends a test message to slave devices to check their statuses.