FB_TermRegRead_TcPfw()

A function block of this type is used by FB_TempCtrlCallback_TcPfw for read access to EL terminals.

Syntax

VAR_INPUT
    Execute       : BOOL;
    TermType      : E_TcPfw_TerminalType:=eTcPfwTermT_NoTerminal;
    Select        : INT:=-1;
    CycleTime     : LREAL:=0.025;
END_VAR
VAR_IN_OUT
    Ctrl          : USINT;
    State         : USINT;
    InData        : INT;
    OutData       : INT;
END_VAR
VAR_OUTPUT
    RegData       : WORD:=0;
    Busy          : BOOL:=FALSE;
    Done          : BOOL:=FALSE;
    CommandAborted: BOOL:=FALSE;
    Error         : BOOL:=FALSE;
    ErrorID       : UDINT:=0;
END_VAR

Inputs

Name	Type	Description
Execute	BOOL	A rising edge starts the process. A falling edge clears all outputs.
TermType	E_TcPfw_TerminalType	The coded type of the addressed terminal.
Select	INT	The register address of the terminal.
CycleTime	LREAL	The cycle time of the calling task.

Inputs/outputs

Name	Type	Description
Ctrl	USINT	A reference to ST_TcPfw_TempCtrlOutput.KL_SnsCtrl of the terminal.
State	USINT	A reference to ST_TcPfw_TempCtrlInput.KL_SnsState of the terminal.
InData	INT	A reference to ST_TcPfw_TempCtrlInput.KL_SnsData of the terminal.
OutData	INT	A reference to ST_TcPfw_TempCtrlOutput.KL_SnsData of the terminal.

Outputs

Name	Type	Description
RegData	WORD	If successfully executed, the read register content is provided here.
Busy	BOOL	The ongoing activity of the function block is signaled here.
Done	BOOL	The successful completion of the operation is reported here.
CommandAborted	BOOL	A TRUE indicates here that the process was aborted.
Error	BOOL	A TRUE indicates here the occurrence of a problem.
ErrorID	UDINT	In the event of an error, coded information is provided here.

Behavior of the function block:

A rising edge at Execute causes the function block to perform a series of checks:

Select must be in the range 0 to 63 (inclusive).
No other register communication must be active with this terminal.
TermType must identify a KL terminal. Only these support the communication mechanism used here.

If one of the above conditions is not met, an error is reported. Otherwise, the access is transmitted to the terminal. The result of the transmission is provided at the outputs.

	In addition to the above-mentioned error possibilities, problems can occur during transmission. Furthermore, the terminal can report a problem (addressing, values, access type).

	A register access requires that all elements with name beginning with "KL_" in ST_TcPfw_TempCtrlInput are linked.