Switching The Control On And Off - Siemens SINUMERIK 840C Operator's Manual

1 Introduction - SINUMERIK 840C and its Operation
1.3

Switching the control on and off

Switching on
the control
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Machine manufacturer
Switching on of the control can be implemented in various ways by the
machine manufacturer. Please refer to the machine manufacturer's
specifications.
Please note:
The control is switched on by switching on the input voltage at the power
supply of central controller.
After the control has been switched on, different messages appear on the screen
for a few seconds. The control software is loaded, i.e. the MMC, NCK and
PLC operating system software is loaded from the hard disk onto the various
components.
The PLC user program is not loaded when the control is powered up, but is
loaded into the battery-backed RAM memory during start-up.
Power-up of the control is performed in the following sequence:
1. The operating system software is loaded
2. In the next step, the user data are transferred from the hard disk of the
MMC into the NCK memory. The machine manufacturer can configure
which individual data are to be transferred.
Both the Siemens and user cycles can be loaded in this way. A cycle disable
feature provides protection against unauthorized reading and editing of data
both in the NCK memory and on the MMC side.
The machine data (TEA1, TEA2, etc.) are not normally loaded during
power-up. These data are stored in the battery-backed static RAM of the
NCK.
3. The system now loads all of the data stored in the STANDARD workpiece.
The machine manufacturer can also configure whether the last selected
workpieces are to be loaded from the hard disk at this stage. If, in the 3rd
phase, the same data are loaded with a workpiece (e.g. RPA, TOA etc.) as
in the 2nd phase, these data are overwritten in the NCK memory by the
workpiece-related data.
If not otherwise configured by the machine manufacturer, the main menu of the
JOG mode appears after power-up of the control. Operator actions on the
control can be performed after the screen has built up completely.
6FC5198-6AA60-0BP1 © Siemens AG 1999 All Rights Reserved
SINUMERIK 840C, OEM Version for Windows (BA)
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