Loading Data Into The Nck On Starting Up The Control (As From Sw 2) - Siemens SINUMERIK 840C Installation Instructions Manual

10.94
1.6 Loading data into the NCK on starting up the control
(as from SW 2)
After the control has been switched on, data are transmitted from the hard disk of the MMC
into the memory of the NCK-CPU in 3 phases:
Phase 1: The system program of the NC-CPU is booted if
• the NC-CPU (using the Boot-EPROM) detects that the system program has
been lost in the DRAM (the program memory ist not buffered by a battery)
• a preceding boot process has been aborted by PO or mains off
• user operations have initiated forced booting
• the NCK operating system has detected a system error before mains off (or
PO reset) and is consequently no longer able to maintain data consistency
(alarm: start-up due to system error)
In this phase the "NCK system being loaded" message is displayed. The user cannot
influence this loading process.
Phase 2: Booting of user data which become effective after PO and are in the volatile
memory (DRAM).
After phase 1 the NC branches into the booted system program and requests the
following data from the MMC:
• the UMS (unless a customer UMS has been installed and activated, the
SIEMENS standard UMS is loaded) if the UMS size has been set to 0
(memory configuration as from SW 4)
• all user data records which were found in the data management tree under
user/NC data in the user branch.
Data records of the IKA*, etc. type are recognized and loaded.
If IKA is used, it is recommended to use this branch for storing the
IKA 2 and IKA 3 data records which are used for machine fault
compensation (use the Services area for copying).
In this phase the message "NCK user data being loaded" is again displayed.
After booting these user data records, the NC initiates a communication bus reset and runs its
initialisation programs (e.g. preparation and calculation of IKA data records) and subsequently
reports NC-RDY provided SIMODRIVE 611 D is switched on.
TEA 1, 2, 3, 4 are not loaded during start-up!
Phase 3: Now any data stored in the standard workpiece are loaded into the NCK.
Note:
The following data are booted:
as from SW 2, NCK data
as from SW 3, NCK and PLC data
as from SW 4, NCK, PLC and drive data (611D)
© Siemens AG 1992 All Rights Reserved
SINUMERIK 840C (IA)

1.6 Loading data into the NCK on starting up the control (as from SW 2)

END OF SECTION
6FC5197- AA50
1 Prerequisites and Visual Inspection
1–11