FB_IotCommand

FB_IotCommand 1:

The function block FB_IotCommand provides functions for evaluating received commands. It must not instantiated, since it is already declared at the output of the FB_IotCommunicator instance and is used to access the outputs and received commands.

Syntax

Definition:

FUNCTION BLOCK FB_IotCommand
VAR_INPUT
END_VAR
VAR_OUTPUT
    bError      : BOOL;
    hrErrorCode : HRESULT;
    bAvailable  : BOOL // if true, a new command is available
    sVarName    : STRING // Name of variable in currently available command
END_VAR

FB_IotCommand 2: Outputs

Name

Type

Description

bError

BOOL

TRUE if an error situation occurs.

hrErrorCode

HRESULT

Returns an error code if the bError output is set.

bAvailable

BOOL

TRUE, if a new command is available.

sVarName

STRING

If bAvailable is TRUE, sVarName contains the name of the variable that was received.

FB_IotCommand 3: Methods

Name

Description

GetValue

Method for accessing the value of the command, if bAvailable is TRUE

Remove

Method for discarding the currently available command

Requirements

Development environment

Target platform

PLC libraries to include

TwinCAT v3.1.4022.0

IPC or CX (x86, x64, ARM)

Tc3_IotCommunicator