Siemens SITRANS PCS 7, Function Manual

Page: 826 / 850

Parameter Description Type Default
NumReqB Number of request bytes sent INT 0
Cmd Number of HART command with which
the data record is read
INT 0
RdReq Read request with positive edge BOOL 0
DataType Data type selection:
1 = data type ’101’ (Simatic: Real with
quality code)
2 = data type ’Float’ (Simatic: Real)
3 = data type ’Uns8’ (Simatic: Byte)
4 = data type ’Uns16’ (Simatic: Word)
5 = data type ’Uns32’ (Simatic: DWord)
INT 0
LenUsrDat Length of the read data without header
of the HART protocol
INT 0
Offset Start address of the parameter in the
read data record without the header of
the HART protocol, e.g., as of byte 12
INT 0
In/out parameters
Parameter Description Type Default
AcyclData Acyclic data STRUCT
1)
0
1)
Configuration of the output structure AcyclData:
AcyclData STRUCT Description
SlotRd : INT Number of the slot for read requests
ReqRd : INT Request for reading the data record with this num‐
ber (-1 = no request)
LenRd : INT Length in bytes of the data record to read
SlotWr : INT Number of the slot for write requests
ReqWr : INT Request for writing the data record with this num‐
ber (-1 = no request)
LenWr : INT Length in bytes of the data record to write
RdyRead : INT The data record with this number was read (-1 =
no data record read)
RdyWrite : INT The data record with this number was written (-1 =
no data record written)
RetValRd :
WORD
Return value of SFB RDREC (SFB52) for the read
job
RetValWr :
WORD
Return value of SFB WRREC (SFB53) for the read
job
Input STRUCT Data that was read from the DP slave
Para0 : DWORD Value of input data
… …
Para63 : DWORD Value of input data
END_STRUCT
Driver blocks
18.3 PiEl256H
SITRANS Library for PCS 7
826
Function Manual, 05/2019, A5E35351976-11