FB_BA_GetBACnetAdapterTime

The function block can be used to determine the local BACnet system time of a TwinCAT system.

Internally, an internal software clock is implemented by means of the function block "RTC_EX2" (Extended Real Time Clock). This software clock is initialized with the BACnet system time and output by the two structures stDateTime and stTimeStruct.

The function block should be called in every PLC cycle, so that the current time can be calculated.

Illustration

FUNCTION_BLOCK FB_BA_GetBACnetAdapterTime
VAR_INPUT
     bTrig                      : BOOL;
     {attribute 'parameterUnit':= 'ms'}
     nTiAuto                    : UDINT;
END_VAR
VAR_OUTPUT
     bSuccess                   : BOOL;
     stDateTime                 : ST_BA_DateTime;
     stTimeStruct               : TIMESTRUCT;
     bError                     : BOOL;
END_VAR

Inputs

Name	Type	Description
bTrig	BOOL	A rising edge at this input determines the local BACnet system time of a TwinCAT system.
nTiAuto	UDINT	Based on this time information, the local BACnet system time of a TwinCAT system is regularly determined automatically. The time specification must be greater than or equal to 500ms.

Name

Type

Description

bTrig

BOOL

A rising edge at this input determines the local BACnet system time of a TwinCAT system.

nTiAuto

UDINT

Based on this time information, the local BACnet system time of a TwinCAT system is regularly determined automatically.

The time specification must be greater than or equal to 500ms.

Outputs

Name	Type	Description
bSuccess	BOOL	The system time was read successfully from the target system. The variable is TRUE for one cycle.
stDateTime	ST_BA_DateTime	Current BACnet system time of a TwinCAT system.
stTimeStruct	TIMESTRUCT	Current BACnet system time of a TwinCAT system.
bError	BOOL	Error while reading the BACnet system time.

Requirements

Development environment	Required PLC library
TwinCAT from v3.1.4024.22	Tc3_BA2 from v5.2.5.0