General introduction to the discrete application -specific function
5
Introduction to the discrete application
Introduction The application-specific discrete function on the Micro applies to rack-mounted discrete input/output modules.
In order to install the discrete application, the physical context (processor and l l module type, and the position of the modules in the rack) must be defined and the necessary software installation carried out.
This second aspect will be carried out using the different PL7 editors: either in local mode, or in online mode. In this case, modification is limited to certain parameters.
Note: The application program can be created before the physical configuration to prevent it from being linked to a certain type of hardware. However, program execution will depend upon the definition of the physical configuration
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General introduction
Installation principles
Mode
Local
Local or online
Online
The table below shows the different installation phases of the discrete applicationspecific function.
Phase
Declaration of a module
Configuration of module channels
Description
Selection of the module and its geographical position
Entry of configuration parameters.
Confirmation of configuration parameters
(See Configuration of
discrete parameters, p. 80 )
Confirmation of module level.
Global confirmation of the application (See Confirming the configuration of a
module., p. 60 )
Confirmation of application level.
Programming
Transfer
Documentation
Debugging
Programming of functions to be performed by the application using: l l bit and word objects associated with the module, specific application instructions.
Transferring the application to the PLC.
Printing the different information relating to the application.
Debugging of the application using: l debugging help screens enabling the user to control inputs/ outputs, l diagnostics screens enabling the user to identify faults.
Note: The order shown above is given as an indication only. The PL7 software allows the editors to be used interactively in the order required (however, the data editor cannot be used if the input/output modules have not been configured first).
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