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  1. Jozef
  2. PLCnext Technology & PLCnext Controls
  3. Sunday, 10 February 2019

installed HW: 02 FW: without SD card.
Installed nodered and opc-iiot-ua.
How is memory splitted between Main and runtime memory ?
If main memory is 80% used and PLC uses only 1%, is this a relationship between ?
Can be external SD card used for installation of nodered, python, openhab2 etc.?
Accepted Answer
Martin PLCnext Team Accepted Answer Pending Moderation

Hi Jozef,

On the topic of mass storage on the AXC F 2152:

The AXC F 2152 has 512 MB of internal memory. The PLCnext firmware files occupy some of this, obviously. The remainder of the internal memory is available for user applications.

When an SD card is inserted into the controller, the SD card is mounted as an overlay file system, and the entire contents of the internal memory are copied to the SD card. Any additional space on the SD card is also available for user applications, up to the capacity of the SD card. So adding an SD card will give you more memory for your applications.

Note that the SD card must be formatted in a proprietory way, so you can only use an SD card purchased from Phoenix Contact. At the moment we have a 2GB SD card available, but we expect that cards with more memory will be available in future.

Hope this helps.

- Martin

Phoenix Contact Electronics Headquarters - PLCnext Runtime Product Management and Support

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