FB_MDP_Write

FB_MDP_Write 1:

The function block enables the MDP TwinCAT module to be queried.

VAR_INPUT

VAR_INPUT
    bExecute        : BOOL;             (* Function block execution is triggered by a rising edge at this input.*)
    stMDP_DynAddr   : ST_MDP_Addr;
    pSrcBuf     : POINTER TO BYTE;              (* Contains the address of the buffer for the sent data. *)
    cbSrcBufLen     : UDINT;                (* Contains the max. number of bytes to be sent. *)
    tTimeout        : TIME := DEFAULT_ADS_TIMEOUT;  (* States the time before the function is cancelled. *)
    sAmsNetId       : T_AmsNetId;          (* keep empty '' for the local device *)
END_VAR

bExecute	The function block is called by a rising edge on the input bExecute, if the block is not already active.
stMDP_DynAddr	The MDP addressing belonging to the selected network module is specified at this input. The structure is of the type ST_MDP_Addr. The dynamic Module ID must already be specified with it.
pSrcBuf	The memory address of the data buffer is specified at this input. The data to be transmitted must be stored there.
cbSrcBufLen	The length of the data buffer in bytes is specified at this input.
tTimeout	Specifies a maximum length of time for the execution of the function block.
sAmsNetId	For local access don't specify this input or allocate an empty string. For remote access to another computer specify its AMS Net Id.

VAR_OUTPUT

VAR_OUTPUT
    bBusy       : BOOL;
    bError      : BOOL;
    nErrId      : UDINT;
END_VAR

bBusy	This output is TRUE if the function block is active.
bError	Becomes TRUE as soon as an error situation occurs.
nErrID	Returns an error code if the bError output is set.

Requirements

Development environment	Target platform	PLC libraries to be linked
TwinCAT v2.11.0 Build >= 1541	PC or CX (x86, ARM)	TcMDP.Lib