FB_BACnetBO1202

BACnet binary output

FB_BACnetBO1202 1:

Functional description

This function block generates a BACnet binary output object and provides write and read variables for the object within the PLC.
This function block is the "medium" version in terms of functionality.
Alternatively the following versions are available:

The parameters, which can be written from the PLC, can also be written from the BACnet side; the last change is always the valid one. These parameters are transferred from the PLC via ADS and into the PLC via a cyclic interface. On the PLC side, all parameters have an additional Enable input: when the respective Enable input is set for the first time (rising edge), the value at the parameter input is transferred in any case; subsequently, if Enable is set, it is only transferred if it changes, in order to reduce the ADS traffic. If the Enable input is not set, no transfer takes place.

PLC variable	Comment	BACnet-Property (Property ID)
bEnPrioA	Enable for writing the priority entered under usiPrioA into the priority array
bValPrioA	Value to be written	Priority-Array (87)
usiPrioA	Selection of the priority (1..16) to be written in the priority array
bEnPrioB	Enable for writing the priority entered under usiPrioB into the priority array
bValPrioB	Value to be written	Priority-Array (87)
usiPrioB	Selection of the priority (1..16) to be written in the priority array
bEnPrioC	Enable for writing the priority entered under usiPrioC into the priority array
bValPrioC	Value to be written	Priority-Array (87)
usiPrioC	Selection of the priority (1..16) to be written in the priority array
bEnPrioD	Enable for writing the priority entered under usiPrioD into the priority array
bValPrioD	Value to be written	Priority-Array (87)
usiPrioD	Selection of the priority (1..16) to be written in the priority array
bEnEvtEn	Enable for writing the EventEnable bit pattern
stEvtEn	Property value bit pattern EventEnable	EventEnable (35)
bEnTiDly	Enable for writing the message delay [s]
udiTiDly	Property value message delay [s]	TimeDelay (113)

Inputs/outputs

VAR_INPUT

bEnPrioA      : BOOL;
bValPrioA     : BOOL;
usiPrioA      : USINT;
bEnPrioB      : BOOL;
bValPrioB     : BOOL;
usiPrioB      : USINT;
bEnPrioC      : BOOL;
bValPrioC     : BOOL;
usiPrioC      : USINT;
bEnPrioD      : BOOL;
bValPrioD     : BOOL;
usiPrioD      : USINT;
bOvrrd        : BOOL;
bEnFdbVal     : BOOL;
bFdbVal       : BOOL;
bEnEvtEn      : BOOL;
stEvtEn       : ST_BACnet_EventTransitionBits;
bEnTiDly      : BOOL;
udiTiDly      : UDINT;

bEnPrioA: enable for writing

bValPrioA: value that is written to priority usiPrioA in the priority array.

usiPrioA: selection of the priority (1..16) to be written

bEnPrioB: enable for writing

bValPrioB: value that is written to priority usiPrioB in the priority array.

usiPrioB: selection of the priority (1..16) to be written

bEnPrioC: enable for writing

bValPrioC: value that is written to priority usiPrioC in the priority array.

usiPrioC: selection of the priority (1..16) to be written

bEnPrioD: enable for writing

bValPrioD: value that is written to priority usiPrioD in the priority array.

usiPrioD: selection of the priority (1..16) to be written

bOvrrd: at this input the input signal of a local priority operation, e.g. of an KM2652, can be created. If this input is then "TRUE", this is indicated in the BACnet.

bEnFdbVal / bFdbVal: enable/property value feedback value. This value is written from the PLC to the Property FeedbackValue (Property Id 40), however not via ADS, but via cyclic interface.
It is used for feedback monitoring: if bEnFdbVal is set to TRUE, bFdbVal must have the same value as the output Present Value within the time specified in the BACnet under TIME Delay (Property Id 113). Otherwise a feedback discrepancy is displayed in the EventState (property ID 36) via the entry "offnormal". If bEnFdbVal is set to FALSE, internally bFdbVal is set to same value as the Present Value, so that feedback discrepancies are avoided.

bEnEvtEn / stEvtEn: enable/property value bit pattern EventEnable

bEnTiDly / udiTiDly: enable/property value message delay [s]

VAR_OUTPUT

bRawIoPrVal  : BOOL;
bPrVal       : BOOL;
bStaInAlm    : BOOL;
bStaFlt      : BOOL;
bStaOvrrd    : BOOL;
bStaOoServ   : BOOL;
udiStaTiDly  : UDINT;
udiActvPrio  : UDINT;
dwObjId      : DWORD;
bErr         : BOOL;
udiErrId     : UDINT;
udiErrArg    : UDINT;

bRawIoPrVal: output value to the digital output terminal

bPrVal: current value of the binary output object - read directly from the BACnet

bStaInAlm: indicates the state of the status flag "InAlarm" of the binary output object.

bStaFlt: indicates the state of the status flag "Fault" of the binary output object.

bStaOvrrd: indicates the state of the status flag "Overridden" of the binary output object.

bStaOoServ: indicates the state of the status flag "OutOfService" of the binary output object.

udiStaTiDly: indicates the currently parameterized TimeDelay (property ID 113).

udiActvPrio: indicates which priority is active.

dwObjId: BACnet object ID of the binary output object

bErr: indicates a general error in the function block. The cause can be in BACnet, in the ADS data exchange, or due to incorrect parameterization.

udiErrId / udiErrArg: contains the error number and the error argument. See error codes.

VAR_IN_OUT

stComnMsg : ST_BA_ComnMsg;
fbDvc     : FB_BACnet_Device;

stComnMsg: reference to the connection structure for the collective message function block FB_BA_ComMsg.

fbDvc: reference to the function block of the BACnet device object

Requirements

Development environment	Target system	required library	required supplement
TwinCAT 2.11 R3/x64	PC/CX	TcBA library from V1.0.0	TS8040 \| TwinCAT Building Automation from V1.0.0