Siemens SINUMERIK 840C Installation Instructions Manual page 1040

07.97
The set configuration is activated through selection of softkey "Reconfig. memory". The
activation command is rejected if
• the NC is not in general reset mode. In this case, the dialog box "Only possible in reset"
appears which is acknowledged with "ok". The user can switch to general reset mode and
select softkey "Reconfig. memory" again (the set data are not lost when the user
switches to general reset mode).
• the set configuration would require more memory than is actually available. The dialog box
"Insufficient memory space" then appears which is acknowledged with "ok". The user
can correct his memory configuration.
The softkey "Reconfig. memory" initiates an NCK reset and the NCK system program and, in
some cases, the customer UMS are re-booted. If it is detected that the memory required
exceeds the actual memory available (in particular, when the real size of the UMS is taken into
account) when the MD are checked again, then no UMS boot operation takes place and the
dialog box "UMS too large UMS not loaded" is displayed.
The NC updates the "online" machine data 60009, 60010, and 60011 at this point in time.
If the number of R parameters or TO parameters has been changed, then "Format user
data" must be executed in general reset mode.
If the user does not wish a UMS load operation, then he must set MD 60000 to zero. The
entry "UMS 512" in the file "Master control/Config." has no meaning with SW version 4 and
higher.
NC machine data:
MD 60009 to 60011 are not evaluated by the NC and are used only for display purposes.
The machine data in the "Start-up/Data" directory can be read out as usual via the computer
link or V24 or read in to the control. When the user reads in the new MD, however, he must
remember that these MD, which can also be examined online with the aid of MDD, need not
necessarily have anything to do with the actual memory configuration. The memory
configuration is determined solely by the file NCMEMCFG on the disk.
The file NCMEMCFG can be read in and out via the V24 by means of the MMC services. By
selecting the softkey sequence Services/Data output, the user can call the display in which
all accessible directories are displayed. He can then call the NC/DATA directory by moving the
cursor and selecting the input key. This directory contains the NCMEMCFG file.
Loading the drive SW up to SW 5:
The default setting of "0" for MD 60003 and 60004 means that no memory capacity is
reserved for the drive SW during initial start-up after the system has been upgraded with
SW 4. When digital drives are started up, however, memory space must be reserved explicitly
for the drive software.
A default setting of "0" offers the following advantages when the system is upgraded:
• If a module with 386 CPU is installed, then the user does not need to change the MD
mentioned above. With a default setting of "1", the user would be forced to reconfigure
the memory.
• If a module with 486 CPU is installed, but no digital drives connected, then the MD
mentioned above remain unchanged.
© Siemens AG 1992 All Rights Reserved
SINUMERIK 840C (IA)
12.25.4 Memory configuration on control power-up
6FC5197- AA50
12 Functional Descriptions
12–265