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3GFK–0644A Chapter 1 Introduction
Application Software
The Series 90–70 I/O Link Interface Module is provided with two application software
diskettes (catalog number IC641SWP708), a 3-inch and a 5-inch diskette. The content
of these diskettes is the same.
This application software can be used to integrate up to four I/O Link Interface Modules
into the PLC’s application program. There are three Program Blocks on a diskette. Each
will transfer I/O data between the module and the PLC, perform diagnostics functions,
and transfer application program commands to the module.
One Program Block is selected as being most appropriate for the application, and added
to the application program. Additional application program logic can be created to
perform the following functions:
1. To specify the number of I/O Link Interface Modules present in the PLC.
2. To specify, for each I/O Link Interface Module:
A. A rack and slot location in the Series 90–70 PLC.
B. Master or slave operation.
3. And, for each I/O Link Interface Module that will be a master:
A. To assign a data length and I/O addresses for each slave on its link.
B. To control operation of the link and monitor module and link status.
Chapter 4 explains how to select the best Program Block for your system, and how to
incorporate it in an application program.