Siemens SINUMERIK 840Di Manual page 30

1 General on the SINUMERIK 840Di
1.1 Overview of SINUMERIK 840Di
Virtual SRAM
Connection
options
1-30
This can be avoided by using a UPS, e.g. SITOP POWER DC UPS MODULE
15 (see Section 2.11, page 2-90). 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.
During this time, the user can correctly shut down Windows NT manually, or
automatically by means of a status message from the UPS to the PLC, which
then passes the interface signal "PC shutdown" to the NC.
In conjunction with the virtual SRAM (see Subsection 10.4.3, Page 10-300), it is
absolutely necessary to use a UPS system. Furthermore, when parameterizing
the time for which the UPS is to maintain the voltage supply, the time required
by Windows NT to produce the memory dump to the hard disk of the PCU after
detecting a serious exception (Blue Screen) should be considered.
The stated UPS has the following options for connections to signal the current
status to the SINUMERIK 840Di:
Table 1-1 Connection option of the UPS
Connection Message to
1) RS232 interface of Windows NT
-
the UPS –> serial inter-
face of the PCU
(COMx)
2) Message terminals PLC
via free wiring –> S7
I/O inputs
3) Message terminals NC
via free wiring –> MCI (SW 2.3 and
board extension inputs higher)
Notes
Re.: 3) For details of the start/up behavior of SINUMERIK 840Di with shutdown
signal present, refer to Subsection 6.3.9, Page 6-187.
Notice
One of the follwoing connection variants must be used for full back-up protec-
tion:
– Variant 1: Connection 1) and 2)
or
– Variant 2: Connection 3)
Comment
Configuration of the UPS functionality is per-
formed using the Windows NT standard func-
tion UPS Windows NT task bar:
Start > Settings > Control panel > UPS
Advantage:
Also works if the PLC application program is
not active.
Disadvantage:
Does not work in the event of serious excep-
tions from Windows NT (BlueScreen)
The UPS functionality is configured using the
PLC user program.
Advantage:
Also works in the event of serious exceptions
from Windows NT (BlueScreen)
Disadvantage:
PLC user program must be active
The UPS functionality is configured using the
menu. Settings in HMI Advanced (see Subsec-
tion 10.10.2, Page 10-399).
Advantage:
Also works in the event of serious exceptions
from Windows NT (BlueScreen) and not if the
PLC application program is active.
Prerequisite: MCI board extension (option)
 Siemens AG, 2003. All rights reserved
SINUMERIK 840Di Manual (HBI) – 06.03 Edition
06.03