Cpu Replacement - Siemens SINUMERIK 840C Installation Instructions Manual

01.99 11 Data Backup/CPU Replacement

11.1.8 CPU replacement

11.1.8 CPU replacement
NCK CPU replacement
Follow installation and startup instructions according to flow diagram "Loading from hard disk"
(Section 11.1.7).
Note:
PLC data need not be loaded.
When replacing NCK CPU, items 8 to 14, 20 to 22 as well as 30, 31 and 37 to 63 do not
apply.
After completion of the installation and startup procedure, switch to "Power on".
Note:
Setting data, zero offset and tool compensation are missing.
PLC CPU replacement
Follow installation and startup instructions according to flow diagram "Loading from hard disk"
(Section 11.1.7).
Prerequisite:
The current PLC fixed program is installed on the hard disk.
When replacing PLC CPU, items 8 to 10, 16 to 29 as well as 32, 36 and 37a to 63 do not
apply.
Caution:
The contents of data blocks (e.g. tool management) are missing.
MMC CPU replacement
Follow installation and startup instructions according to flow diagram "Loading using the
streamer" (Section 11.1.5) or flow diagram "Loading from hard disk", steps 8 to 66.
Caution:
If MMC CPU requires replacement (e.g. because of a defective hard disk) ensure that no MMC
software is installed on the new hard disk and that not the same software version as on the
previous hard disk is installed.
11–15
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SINUMERIK 840C (IA)
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