BACnet IP

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Since version 3.0, WebHMI supports the BACnet IP protocol.

For the moment, the Read Property and Write Property queries have been implemented. The Present Value properties are read. Such types of registers are read and written:

• Analog Input
• Analog Output
• Analog Value
• Binary Input
• Binary Output
• Binary Value
• Multi State Input
• Multi State Output
• Multi State Value

In WebHMI, such addressing of BACnet IP registers is accepted:

Register address	Description	Datat type	Read/Write
AIxx	Analog Input. xx — input number (valid values from 0 to 65535). Examples: AI1, AI12, AI44	Double Word, Float, 32 IEEE 754	Read/-
AOxx.yy	Analog Output. xx — output number(valid value range 0..65535). Example: AO1, AO12, AO44.2, AO23.17. yy — write priority, see below	Double Word, Float, 32 IEEE 754	Read/Write
AVxx.yy	Analog Value. xx — value number (valid value range 0..65535). Example: AV1, AV12, AV44.2, AV23.17. yy — write priority, см. ниже	Double Word, Float, 32 IEEE 754	Read/Write
BIxx	Binary Input. xx — input number(valid range 0..65535). Examples: BI1, BI12, BI44	Bit	Read/-
BOxx.yy	Binary Output. xx — output number (valid range 0..65535). Examples: BO1, BO12, BO44.2, BO23.17. yy — write priority, см. ниже	Bit	Read/Write
BVxx.yy	Binary Value. xx — value number (valid range 0..65535). Examples: BV1, AV12, BV44.2, BV23.17. yy — write priority, см. ниже	Bit	Read/Write
MIxx	Multi State Input. xx — input number(valid range 0..65535). Examples: MI1, MI12, MI44	Byte, Unsigned Int	Read/-
MOxx.yy	Multi State Output. xx — output number(valid range 0..65535). Examples: MO1, MO12, MO44.2, MO23.17. yy — write priority, см. ниже	Byte, Unsigned Int	Read/Write
MVxx.yy	Multi State Value. xx — output number(valid range 0..65535). Examples: MV1, MV12, MV44.2, MV23.17. yy — write priority, см. ниже	Byte, Unsigned Int	Read/Write

When writing new values ​​to registers with missing '.yy' in the register's address the default priority is used. Example of such address: AI22

If you specify a number from 1 to 16 after the point, for example AI22.9, then writing to the register will occur with the specified priority. In this example, this will be 9.

If you want to organize writing with the priority NULL, then in the register address you need to specify the number 17. Example AI22.17.