Lenze DDS Function library IOSystem - Manual (Page 13)

Function library LenzeIOSystem.lib
Application examples
3.1 Modular decentralised I/O system
3−3
L
LenzeIOSystem.lib EN 1.7
Programming the process data exchange between PLC and I/O system
The CFC editor is used to generate a program named Process.
·
Declare an instance of function block L_IOData15 in Process.
·
Generate two inputs in the CFC editor, assign names g_bParDone15 and g_ParData15 and
attach these to the corresponding inputs of function block L_IOData15 as shown in the figure.
Several conversion blocks are available to evaluate input data and to transfer output data.
Function block L_IOData15 transmits output data to the I/O system and receives input data from
there.
At input DataFrom_IOParPDO15, CAN communication relationships between PLC and I/O system
are transmitted from parameterisation block L_IOParPDO15 to process data block L_IOData15.
Process data transmission is started after parameterisation via a High signal at input
bEnablePDOTransfer.
Data conversion for evaluating individual channels
The program Process can be extended as follows:
·
Use the menu command Extras
ÞOrder to indicate the sequence.
·
Drag the individual function blocks to their positions in order to make the program sequence
comprehensible.