01/2007
5.3 Booting
5-116
© Siemens AG 2007 All Rights Reserved
SINUMERIK 840Di sl Manual (HBIsl) – 01/2007 Edition
Notice
Saving of the user data in the SRAM of the MCI board in case of power failure
is only guaranteed if the PCU is operated within its defined specifications.
References: /BH/ Operator Components, Manual
Section: Component PCU 50
If the SINUMERIK 840Di sl was operated outside its defined specifications, it
may not be possible to save the user data in the SRAM. Therefore, proceed as
described in Section 5.3.3, Page 5-112 case 2.
5.3.8 Power–up with shutdown signal
If the SINUMERIK 840Di sl is operated with a UPS unit, the shutdown signal
must be configured accordingly. See Section 11.11.2, Page 11-410. If a shut-
down signal is pending, first the NC and PLC and then Windows XP are shut
down correctly.
If power–up is executed with a pending shutdown signal Windows XP is imme-
diately correctly shut down again.
The system responds as follows if it is powered up a second time with pending
shutdown signal:
– Windows XP is not
immediately shut down correctly.
– NC and PLC are not
started
– The following message box appears:
SINUMERIK 840Di sl NCK/PLC
Interrupt: NCK started while Power Failure, shutdown with OK
OK
This system response ensures that an error in the protection circuit of the MCI
board extension module or in the configuration of the shutdown signal does not
result in an endless loop (power–up > shutdown signal > power–up > etc.).
As long as the message box has not been acknowledged the protective circuit
of the MCI board extension module and the configuration of the shutdown signal
(see Section 11.11.2, Page 11-410) can be checked and changed, if necessary.
If the shutdown signal has been acknowledged from the message box, the NC
and PLC are started. Otherwise Windows XP is again shut down correctly.
Case 2:
SRAM not
saved
1st start–up
From 2nd
power–up
5 Power On and Power–U
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