FB_Dpv1Read

VAR_INPUT

VAR_INPUT
    bExecute          : BOOL;
    aNetId            : T_AmsNetId; (* NetID of Profibus Master FC310x/EL6731 *)
    iProfibusSlaveAdr : USINT; (* DP address of ProfiDrive *)
    iDriveId          : USINT; (* 1..16 possible *)
    pDpv1ReqData      : POINTER TO ARRAY [1..iMAX_DPV1_SIZE] OF BYTE;
    iDpv1ReqDataLen   : UDINT;
    pDpv1ResData      : POINTER TO ARRAY [1..iMAX_DPV1_SIZE] OF BYTE;
    iDpv1ResDataLen   : UDINT;
    tTmOut            : TIME := DEFAULT_ADS_TIMEOUT;
END_VAR

bExecute: the block is activated by a positive edge at this input.

aNetId: The network address of the Profibus master device (see ADS tab of the Profibus master device in the I/O configuration in the TwinCAT system, type: T_AmsNetID).

iProfibusSlaveAdr: The Profibus slave DP address of the drive. This is an address for several axes, specified in the TwinCAT system in the I/O configuration.

iDriveID: The ID is 1 for the controller unit, 2 for the drive object A and 3 for the drive object B of a double/triple drive. The drive ID is set in the starter software. 1 – 16 is possible.

pDpv1ReqData: Pointer to an array of 240 bytes containing the DPV1 read telegram. This telegram must be created by the F_CreateDpv1ReadReqPkg function before the DPV1 read is activated via bExecute.

iDv1ReqDataLen: Maximum length of the DPV1 data buffer (240 bytes).

pDpv1ResData: Pointer to an array of 240 bytes containing the DPV1 read response telegram. This telegram must be evaluated by the F_SplitDpv1ReadResPkg function after a falling edge appears at bBusy.

iDv1ResDataLen: Maximum length of the DPV1 response data buffer (240 bytes).

tTmOut: Maximum time allowed for the execution of the command.

VAR_OUTPUT

VAR_OUTPUT
    bBusy        : BOOL;
    bError       : BOOL;
    bErrorValues : BOOL;
    iErrId       : UDINT;
    iErrorClass  : BYTE;
    iErrorCode   : BYTE;
END_VAR

bBusy: This output goes TRUE as soon as the function block is activated via bExecute and remains TRUE as long as the block has not received a response.

bError: In case of errors this output goes TRUE and bBusy goes FALSE.

bErrorValues: TRUE if the DPV1 read was unsuccessful or only partly successful. The error causes are returned via the error ID (as well as class and code).

nErrId: Returns the ADS error number or function-block-specific error numbers if bError = TRUE.

nErrClass: Profidrive error class.

nErrCode: Profidrive error code.

VAR_IN_OUT

VAR_OUTPUT
    iRequestRef : USINT; (* 1..127; 0: reserved *)
END_VAR

iRefRequest: Reference that is automatically incremented with each telegram. The reference is required for the allocation of the responses to the write/read requests.

Requirements