FB_CTRL_GET_SYSTEM_TIME

FB_CTRL_GET_SYSTEM_TIME 1:

The function block reads the current Windows system time and makes it available in the SystemTimeStruct.

Description

This function block makes the current system time available in its output structure. The resolution is specified through the tCtrlCycleTime parameter; the maximum resolution is 10 ms, and it is necessary to observe the condition "tCtrlCycleTime > 2 • tTaskCycleTime". Otherwise the resolution is reduced to "2 • tCtrlCycleTime".

VAR_OUTPUT

VAR_OUTPUT
    stSystemTime    : TIMESTRUCT;
    eErrorId        : E_CTRL_ERRORCODES;
    bError          : BOOL;
END_VAR
TYPE TIMESTRUCT
STRUCT
    wYear           : WORD;
    wMonth          : WORD;
    wDayOfWeek      : WORD;
    wDay            : WORD;
    wHour           : WORD;
    wMinute         : WORD;
    wSecond         : WORD;
    wMilliseconds   : WORD;
END_STRUCT
END_TYPE

Name	Type	Description
stSystemTime	TIME STRUCT	Structure in which the system time is output.
eErrorId	E_CTRL_ ERROR CODES	Supplies the error number when the output `bError` is set.
bError	BOOL	Becomes TRUE as soon as an error situation occurs.
wYear	WORD	The year: 1970 ~ 2106;
wMonth	WORD	The month: 1 ~ 12 (January = 1, February = 2 etc.);
wDayOfWeek	WORD	The day of the week: 0 ~ 6 (Sunday = 0, Monday = 1 etc.);
wDay	WORD	The day of the month: 1 ~ 31;
wHour	WORD	Hour: 0 ~ 23;
wMinute	WORD	Minute: 0 ~ 59;
wSecond	WORD	Second: 0 ~ 59;
WMilliseconds	WORD	Millisecond: 0 ~ 999;

VAR_IN_OUT

VAR_IN_OUT
    stParams    : ST_CTRL_GET_SYSTEM_TIME;
END_VAR

Name	Type	Description
stParams	ST_CTRL_ GET_SYSTEM_TIME	Parameter structure of the function block

stParams consists of the following elements:

TYPE
ST_CTRL_GET_SYSTEM_TIME:
STRUCT
    tTaskCycleTime : TIME;
    tCtrlCycleTime : TIME;
END_STRUCT
END_TYPE

Name	Type	Description
tCtrlCycleTime	TIME	Cycle time with which the control loop is processed. This must be greater than or equal to the TaskCycleTime. The function block uses this input value to calculate internally whether the state and the output values have to be updated in the current cycle.
tTaskCycleTime	TIME	Cycle time with which the function block is called. If the function block is called in every task cycle this corresponds to the task cycle time of the calling task.