Lenze DDS Function library IOSystem Manuel d'utilisateur télécharger pdf (Page 13)

Function library LenzeIOSystem.lib

Application examples

3.1 Modular decentralised I/O system

3−3

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 ExtrasÞOrder to indicate the sequence.

· Drag the individual function blocks to their positions in order to make the program sequence

comprehensible.

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 82 83

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Lenze DDS Function library IOSystem Manuel d'utilisateur Page 13