Folders and PLCnext environment variables

The following directories with the associated environment variables are required in the system for app administration:

Environment variable Value Use
ARP_HOME_DIR /opt/plcnext Working directory of the PLCnext Runtime
ARP_ACTIVE_APPS_DIR $ARP_HOME_DIR$/apps Contains the folders of the mounted app containers.
ARP_APPS_HOME_DIR $ARP_HOME_DIR$/appshome All app data such as persistent memory and symlinks to determine binaries are
stored here.
ARP_APPS_DATA_DIR $ARP_APPS_HOME_DIR$/data Represents the root storage folder for persistent app data.
ARP_APPS_TEMP_DIR /var/tmp/appsdata Represents the root storage folder for temporary data of the apps.
ARP_APPS_BIN_DIR $ARP_APP_HOME_DIR$/bin

Storage directory for the symlinks to the command line tools of the apps.
This is entered in the PATH
environment variable for all users.