4.2.3 Memory management
The CPU has an integrated memory. Information about the capacity of the memory may
be found at the front of the CPU. The memory is divided into the following parts:
n
Load memory 2MB
n
Code memory (50% of the work memory)
n
Data memory (50% of the work memory)
n
Work memory 512kbyte
–
There is the possibility to extend the work memory to its maximum printed
capacity 2MB by means of a memory extension card.
4.2.4 Slot for storage media
At this slot the following storage media can be plugged:
n
SD respectively MCC (
M
ulti
m
edia
c
ard)
–
External memory card for programs and firmware.
n
MCC -
M
emory
c
onfiguration
c
ard
–
External memory card (MMC) for programs and firmware with the possibility to
unlock additional work memory.
–
The additional memory can be purchased separately.
storage media - MMC, MCC’ page 85
–
To activate the corresponding card is to be installed and an
Overall reset
is to be
Chap. 5.13 ‘Overall reset’ page 81
4.2.5 Battery backup for clock and RAM
A rechargeable battery is installed on every CPU to safeguard the contents of the RAM
when power is removed. This battery is also used to buffer the internal clock. The
rechargeable battery is maintained by a charging circuit that receives its power from the
internal power supply and that maintain the clock and RAM for a max. period of 30 days.
–
Please connect the CPU at least for 24 hours to the power supply, so
that the internal accumulator/battery is loaded accordingly.
–
Please note that in case of repeated discharge cycles (charging/
buffering) can reduce the buffer time continuously. Only after a
charging time of 24 hours there is a buffer for max. 30 days.
CAUTION!
–
After a power reset and with an empty battery the CPU starts with a
BAT error and executes an overall reset. The loading procedure is not
influenced by the BAT error.
–
The BAT error can be deleted again, if once during power cycle the
time between switching on and off the power supply is at least 30sec.
and the battery is fully loaded. Otherwise with a short power cycle the
BAT error still exists and an overall reset is executed.
Memory
VIPA System 300S
+
Hardware description
Structure > Battery backup for clock and RAM
HB140 | CPU | 314-6CF23 | en | 19-01
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