Plc Diagnosis; Introduction - HEIDENHAIN iTNC 530 Service Manual

11 PLC Diagnosis

11.1 Introduction

PLC is a generic term from control technology and is the abbreviation of:
Definition of PLC
Programmable Logic Controller (programmable control).
The PLC is an integral part of a HEIDENHAIN control and is therefore referred to as
Integral PLC.
Tasks of the PLC
To be in a position to carry out adaptation and control tasks, the PLC has to exchange data with
Data exchange
the machine but also with the NC part of the control.
with the PLC
Depending on the type of control, various inputs and outputs are available for data exchange
with the machine.
Data is exchanged between PLC and NC bymarkers, bytes, words, double words and PLC
modules.
See "Error Messages" on page 4 – 21.
PLC error
messages
PLC error messages (text, reaction of the control, etc.) are defined by the machine manufacturer.
Calling the
PLC mode
July 2010
Adaptation of different machine types to HEIDENHAIN controls
Assuming control tasks
Note
The machine manufacturer creates the PLC program for the machine or adapts an existing
PLC project to his machine.
DANGER
Changes in the PLC program or the PLC wiring may influence not only the function but also
the safety of the machine!
This could lead to damage to property or persons.
Changes to the PLC may only be performed by the machine manufacturer!
Select the Programming and Editing operating mode.
If open: Close the program management by pressing the END button.
Note
Pressing the MOD key while the program manager is open calls the interface settings.
Call the code number window.
The PLC main page is displayed.
Note
If the dialog READONLY appears on the left side of the screen, the machine manufacturer has
protected the PLC mode with his own code number.
The diagnosis possibilities with the standard PLC code number 807667 are limited.
--> Ask your machine tool builder!
Enter and confirm the code number.
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