Note
The data records are read by means of acyclic services. Since it is not possible to execute more
than 8 acyclic services simultaneously per Profibus segment, you are responsible for
preventing the simultaneous start of more than 8 jobs. For this reason, you are strongly advised
not to use cyclic read services to read acyclic data. (Each instance of a PiDr64/256 block cannot
process more than one read or write job simultaneously.)
Configuration
Use the CFC editor to install the block in a cyclic interrupt OB (OB30 to OB38). Interconnect the
in/out structure
AcyclData
of the PiEl64/256 block to the output of the same name at the
PiDr64/256 block.
The parameters to be read from the module are specified by means of the block inputs.
Parameter
Meaning
DataType
Specification of the data type of the parameter to read and of the output at which the
parameter is made available:
1 = data type ’101’ (Simatic: Real with quality code), output:
OutRealQC
2 = data type ’Float’ (Simatic: Real), output:
OutReal
3 = data type ’Uns8’ (Simatic: Byte), output:
OutByte
4 = data type ’Uns16’ (Simatic: Word), output:
OutWord
5 = data type ’Uns32’ (Simatic: DWord), output:
OutDword
SlotNo
Number of the slot in HW Config, which is assigned the data record
AbsInd
Absolute Index (= number) of the data record
LenDr
Length in bytes of the data record
Offset
Start address of the parameter in the read data record, e.g. as of byte 12
Startup characteristics
This block has no startup characteristics.
Status word allocation for
Status
parameter
This block does not have the Status parameter.
18.2.2
Operating modes of PiEl64/256
This block does not have any operating modes.
18.2.3
Functions of PiEl64/256
The functions for this block are listed below.
Driver blocks
18.2 PiEl64/PiEl256
SITRANS Library for PCS 7
Function Manual, 05/2019, A5E35351976-11
819
Summary of Contents for SITRANS PCS 7
Page 12: ...Table of contents SITRANS Library for PCS 7 12 Function Manual 05 2019 A5E35351976 11 ...
Page 418: ...SITRANS P 10 2 SitraPDr SITRANS Library for PCS 7 418 Function Manual 05 2019 A5E35351976 11 ...
Page 850: ...Index SITRANS Library for PCS 7 850 Function Manual 05 2019 A5E35351976 11 ...