Siemens SINUMERIK 840C - Manual (Page 29)

10.94 1 Prerequisites and Visual Inspection
1.5.1 Self-test and system start-up
1.5 Voltage and functional tests
1.5.1 Self-test and system start-up
NC area
The checksum of the system program memory is generated whenever the control is switched
on (Power On routines) and during cyclic operation. The control flags discrepancies between
reference and actual checksum in different ways.
The NC CPU flashes continuously (red LED) and goes into the stop state.
MMC area:
If the tests are carried out without any interruptions, the following messages appear in the
MMC area on the screen:
386 Modular BIOS v3.05acf, MR0 1.45 *
Copyright (c)1984-90 Award Software Inc.
(c)1991-92 SIEMENS AG ERLANGEN
TESTING INTERRUPT CONTROLLER #1 . . . . . . . . . . . . . . . . . . . . . . . PASS
TESTING INTERRUPT CONTROLLER #2 . . . . . . . . . . . . . . . . . . . . . . . PASS
TESTING CMOS BATTERY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PASS
TESTING CMOS CHECKSUM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PASS
TESTING EXTENDED CHECKSUM . . . . . . . . . . . . . . . . . . . . . . . . . . . PASS
SIZING SYSTEM MEMORY . . . . . . . . . . . . . . . . . . . . . . . . . . 640K FOUND
TESTING SYSTEM MEMORY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PASS
CHECKING UNEXPECTED INTERRUPTS AND STUCK NMI . . . . . . . . . . PASS
TESTING PROTECTED MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PASS
SIZING EXTENDED MEMORY . . . . . . . . . . . . . . . . . . . . . . . . 3072K FOUND
TESTING MEMORY IN PROTECTED MODE . . . . . . . . . . . . . . 3072K PASS
TESTING PROCESSOR EXCEPTION INTERRUPTS . . . . . . . . . . . . . . . PASS
BIOS SHADOW RAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ENABLED
VIDEO SHADOW RAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ENABLED
Powering up
Hard-disk check (as from SW 4)
During booting from the MMC area, the consistency of the hard disk is checked. This check is
time-dependent and is performed once every week. In this context, it is important to note that
free disk space can be reduced due to lost clusters resulting from frequent switching on and
off the control. It is only by means of a hard-disk check that this disk space can once again be
made available. For this reason, a hard-disk check is also initiated if the remaining available
disk space drops to less than 1 MB.
The setting for the hard-disk check is possible only in the Service Mode and can be carried
out by the system service only.
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* BIOS version
© Siemens AG 1992 All Rights Reserved 6FC5197- AA50 1–9
SINUMERIK 840C (IA)