Lenze DDS Function library IOSystem - Manual (Page 9)

Function library LenzeIOSystem.lib
Introduction
2.1 Introduction
2−1
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LenzeIOSystem.lib EN 1.7
2 Introduction
2.1 Introduction
The user is offered suitable function blocks in function libraries to enable decentralised I/O system
support by Lenze PLC products.
These function blocks are integrated in an IEC 61131 program and assist in the parameterisation of
the I/O system as well as in process data processing. Furthermore, they provide digital and analog
I/O system input and output information.
LenzeI/OSystem.lib
This library provides all setting options. User configuration via user codes is not required.
2.2 Design concept
The function libraries contain two types of function blocks.
·
Parameter data blocks
·
Process data blocks
Parameter data blocks
These function blocks allow the modification of index information in the decentralised I/O system and
the transmission of specified data. These data are transmitted only once to the I/O system during the
initialisation phase.
·
Parameterising communication
– These blocks parameterise communication relationships
(Identifier assignment for PDO communication, transmission method, transmission period,
etc.) between PLC and I/O system.
– These settings are mandatory for data exchange.
·
Parameterising modules and monitoring functions
– The function blocks are required for
individual parameterisation of analog modules,
individual parameterisation of counter modules,
communication monitoring
Process data blocks
These function blocks provide assistance for evaluating and further processing the current process
data information from the I/O system inputs in the PLC program.
Information and data can be transferred into the process via the output modules.
·
Process data blocks to transmit and receive I/O data between PLC and I/O system.
·
Process data blocks for I/O signal conversion.