Siemens Sinumerik 840DiE sl - UPS System

01/2007
1.1 Overview of SINUMERIK 840Di sl
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© Siemens AG 2007 All Rights Reserved
SINUMERIK 840Di sl Manual (HBIsl) – 01/2007 Edition
1.1.9 UPS system
The PCU features POWER FAIL detection that, in conjunction with the NC
system software, ensures that the user data are backed up in the SRAM of the
MCI board on a PCU power failure or power–off without Windows XP first
having been shut down correctly.
The internal power backup time is not long enough for Windows XP to shut
down correctly.
This can be avoided by using a UPS, e.g. SITOP POWER DC UPS MODULE
15 (see Section 2.10, Page 2-76). The UPS also backs up the power supply of
the PCU for a settable duration or until a set battery voltage limit has been
reached.
This gives the user time to correctly shut down Windows XP manually, or per-
mits automatic shutdown via a status signal from the UPS to the PLC, which
then passes the ”PC shutdown” interface signal to the NC.
The above UPS has the following connection options to signal the current sta-
tus to the SINUMERIK 840Di sl:
Table 1-1 Connection options of the UPS system
Terminal
Signal to Comment
1) UPS –> PCU:
USB connection
Windows XP The UPS functionality is configured: see Con-
figuration below.
Advantage
: also works when the PLC user pro-
gram is not active.
Disadvantage
: does not work in the event of
serious exceptions from Windows XP
(BlueScreen)
2) Signal terminals via
free interconnection –>
S7 I/O inputs
PLC The UPS functionality is configured using the
PLC user program.
Advantage
: also works in the event of a fatal
exception error of Windows XP (BlueScreen)
Disadvantage
: PLC user program must be
active
3) Signal terminals via
free interconnection –>
MCI board extension
inputs
NC The UPS functionality is configured using
menu: Settings in HMI Advanced (see Subsec-
tion 11.11.2, Page 11-410).
Advantage
: also works in the event of a fatal
exception error of Windows XP (BlueScreen)
and when the PLC user program is not active.
Requirement: MCI board extension (option)
Note
re 3) For information on the boot response of the SINUMERIK 840Di sl with pending
shutdown signal, see Subsection 5.3.8, Page 5-116.
Notice
One of the following connection variants must be used for full back–up
protection:
– Variant 1: Connection 1) and 2)
– Variant 2: Connection 3)
Physical SRAM
Connection
options
1 General Information on the SINUMERIK 840Di sl