Description of the controllers
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3.12 Parameterization memory
The controllers have an internal parameterization memory. Alternatively, a pluggable pa-
rameterization memory in the form of an SD card can be used, see Section 3.13.
The programs and configurations (e.g., controller IP address) belonging to your
PLCnext Engineer project are stored in the parameterization memory. In addition, applica-
tion-specific data can also be stored in the parameterization memory.
If you make changes to Linux operating system files on the internal parameterization mem-
ory, the Linux operating system generates an overlay file system from the changed files and
directories. If you operate the controller with an SD card, the overlay file system is generated
on the SD card.
On the internal controller parameterization memory, the following data quantities are avail-
able for user-specific data and the overlay file system:
– 512 Mbyte on the AXC F 1152 and AXC F 2152 controllers
– 1 GB on the AXC F 3152 controller
3.13 SD card (optional)
If the internal parameterization memory is not large enough for your application, the control-
ler can be operated using an SD card. The SD card is optional and not required to operate
the controller.
If you operate the controller with an SD card, all application-specific data (e.g., the
PLCnext Engineer project) is stored there.
NOTE: Damage of the internal parameterization memory due to high data traffic
Frequent write accesses in applications with high data traffic can cause long-term dam-
age to the internal parameterization memory of the controller (e.g. DataLogger applica-
tions). This leads to a device defect.
Use an external SD card as storage medium for applications with high data traffic.
Phoenix Contact recommends the SD cards SD FLASH 8GB PLCnext Memory,
order no. 1061701 or SD FLASH 2GB PLCnext Memory order no. 1043501.
The SD card will be recognized during the initialization phase of the controller. If you insert
the SD card during operation, the SD card will not be recognized.
• Make sure that the SD card has been inserted before switching on the controller, in
order to enable the controller to use it.
• Insert and remove the SD card only when the controller supply voltage is
disconnected.
Refer to Section “Diagnostic and status indicators” on page 26 for the LED blink
codes in the event of unauthorized removal of the SD card during operation.
•Only use an SD card provided by Phoenix Contact, see Section “Ordering data” on
page 91.
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