Siemens Servo Screen 390, Руководство по обслуживанию, Страница: 15 / 49

Servo Screen 390
E382 E394E 061 01 02 02 15
Siemens-Elema AB
2. Description of functions
2
• SRAM (only on PC 1662). This battery
backed up memory contains software
settings (e.g. battery replacement date),
T
RENDS
and the E
VENT
L
IST
.
Note – On PC 1835, T
RENDS
and E
VENT
L
IST
are stored on the CompactFlash™ card
and thus not dependent on the battery.
• S
OFTWARE
M
EMORY
C
ARD
I
NTERFACE
• SS390-BIOS. Contains low-level software
(BIOS, drivers, start-up screen including
software loading messages and initial
program load of the application software).
There are two different versions of the
SS390-BIOS:
– SS390-PROM mounted on PC 1662.
This PROM is mounted on a PROM
socket and can be upgraded (replaced) if
required.
– SS390-FLASH mounted on PC 1835.
This FLASH memory can be upgraded
(new software downloaded) if required.
Refer to chapter 4, “Service procedures” for
furher information regarding upgrades.
The computer is equipped with procedures
for self-testing and the self-test result can be
displayed in the S
ERVICE
M
ENU
. See chapter
4, “Service procedures”.
Further functional blocks connected to the
C
OMPUTER
B
OARD
are:
• S
OFTWARE
M
EMORY
C
ARD
• B
ATTERY
• P
ULSE
G
ENERATOR
• C
ONNECTION
P
ORTS
The C
OMPUTER
B
OARD
is connected directly to
the A
DAPTER
B
OARD
via P5.
Software memory card
The S
OFTWARE
M
EMORY
C
ARD
contains the
operating system and the Servo Screen 390
application software. Loading of the soft-
ware into the I
NTERNAL
M
EMORY
is initialized
by the SS390-BIOS during start-up.
There are two different versions of the
S
OFTWARE
M
EMORY
C
ARD
:
• PC Card™ used on PC 1662.
• CompactFlash™-card used on PC 1835.
Note – As patient related T
RENDS
and unit
related E
VENT
L
IST
are stored on the
CompactFlash-card, it is not recommended
to move a CompactFlash-card between
different units.
The software on the memory card is
specifically designed for Servo Screen 390,
and cannot be used on a standard PC.
The software memory card is easy to
replace in case of future software upgrades.
See chapter 4, “Service procedures”.
Battery
The lithium B
ATTERY
(3.6 V) is used to back up
the computer setup stored in the CMOS-
RAM and, for PC 1662, also to back up the
SRAM. If the battery is disconnected,
factory default settings will be used next
time the Servo Screen 390 is started.
The battery must be replaced every three
years. The message ”Replace Servo Screen
390 battery” in the message window
indicates when the battery should be
replaced. A new three-year period will start
when the battery replacement has been
confirmed with the B
ATTERY
C
HANGE
icon in
the S
ERVICE
M
ENU
.
Replacing the battery and Battery change
confirmation is described in chapter
4, “Service procedures”.