YASKAWA iC9200 Series, Operating Manual, Page: 94 / 220

94 HB700 | CPU | PMC921xEx | en | 24-04
Deployment CPU iC921xM-EC
iC9200 Series
Memory management > Internal memory
Non-volatile memory for
retentive data
Fix memory overflow
CAUTION
Damage to the internal parametrization memory due to high data traffic!
−
Due to frequent write accesses at applications with high data traffic e.g.
data logger applications to the overlay file system, the internal parametri-
zation memory of the CPU may be long term damaged and lead to a
device defect.
−
For applications with high data traffic, use an external Yaskawa SD card
as a storage medium for the overlay file system.
■
All data that were marked as retentive in iCube Engineer during configuration are
permanently stored here.
■
In the event of a power failure, retentive data are automatically backed up.
■
By MRESET or resetting to factory setting type 1/2 you can, among others, delete the
non-volatile memory for retentive data.
If, during operation or when starting up the CPU, the error indication occurs that the
memory of the overlay file system in the parametrization memory has overflowed, the
CPU can be restarted via Safe Mode as follows:
1. Switch off the power supply of the CPU.
2. Set the DIP switches S1 under the front flap to the following position:
S1 S1-1 S1-2 Action
0 1
1
2
ON OFF After PowerON the CPU starts in Safe Mode .
3. Switch on the power supply of the CPU again.
🡆
The CPU starts in
⮫
‘Safe Mode’...page 98 . Here, a memory area reserved
exclusively for Safe Mode is enabled, which allows the CPU to restart in the
event of a memory overflow. At Safe Mode the CPU starts with a default project,
but your user programme is still present in the file system.
4. Check your user program for files on the file system that cause the system to
overflow, such as log files, recipes, motion data. Use an SSH client to access the
file system and delete the causing files if necessary. Then start in Standard Mode
again.
5. For this, switch off the power supply to the CPU.
6. Set the DIP switches S1 to the default position:
S1 S1-1 S1-2 Action
0 1
1
2
OFF OFF After PowerON the CPU starts in Standard
Mode - default setting.
7. Switch on the power supply of the CPU again.
🡆
The CPU starts in Standard Mode again. If a project was loaded in Safe Mode, it
is executed in RUN operating mode.