IOF_SER_IDN_Write
The “IOF_SER_IDN_Write” function block allows a value to be written to an S- or P-parameter of a Sercos drive. Data type and size are determined automatically on the basis of the attribute.
VAR_INPUT
VAR_INPUT
sNetId : T_AmsNetId;
nIDN : UINT; (* S: 0******* ********, P: 1******* ******** *)
bExecute : BOOL;
nPort : UINT;
nAttrib : DWORD;
cbLen : UDINT;
dwSrcAddr : PVOID;
tTimeout : TIME := DEFAULT_ADS_TIMEOUT;
END_VAR
sNetId: The network address of the TwinCAT computer on which the ADS command is to be executed can be entered here (type: T_AmsNetId). If it is to be run on the local computer, an empty string can be entered.
nIDN: contains the Sercos parameter number to be accessed for writing. nIDN must lie between 0 and 32767 for S-parameters and between 32768 and 65535 for P-parameters.
bExecute: the block is activated by a positive edge at this input.
nPort: The port number nPort is assigned by the TwinCAT system during the hardware configuration.
nAttrib: Attribute of the parameter, if known. If nAttrib = 0, IOF_SER_IDN_Write first reads the parameter attribute of the drive before the value is written to the parameter of the drive.
cbLen: Length of the data buffer containing the value.
dwSrcAddr: Address of the data buffer containing the value.
tTimeout: States the length of the timeout that may not be exceeded during execution of the command.
VAR_OUTPUT
VAR_OUTPUT
nAttribRd : DWORD;
sAttrib : ST_SercosParamAttrib;
bBusy : BOOL;
bError : BOOL;
nErrId : UDINT;
END_VAR
nAttribRd: Attribute of the parameter; can be saved for the next access (nAttrib) to the parameter.
sAttrib: contains the attribute nAttribRd of the Sercos parameter, broken down into individual variables (type: ST_SercosParamAttrib).
bBusy: When the function block is activated this output is set. It remains set until a feedback is received.
bError: If an error should occur during the transfer of the command, then this output is set once the bBusy output was reset.
nErrId: Supplies the ADS error number when the ERR output is set.
Requirements
Development environment |
Target platform |
IO hardware |
PLC libraries to be integrated (category group) |
---|---|---|---|
TwinCAT v3.1.0 |
PC (x86) |
Sercans SCS-P ISA; Sercans SCS-P PCI; |
Tc2_IoFunctions (IO) |