Emergency Mode
The system and application(s) of the RAC18-IP controller are stored on an SD card. If the SD card is not detected in the device or the device detects frequent reboots (at least 5 times in 6 minutes), which prevent correct operation, the device enters an emergency mode.
What Causes the Emergency Mode?
- No SD card is detected in the device.
- The diagnostic process reveals error in I/Os.
- Storage limit is exceeded.
- Required files are missing during a start-up of the device.
- Libraries or files are corrupted.
Operation in Emergency Mode
In the emergency mode, the device operation is limited:
- libraries are not loaded;
- the SD card configuration is not loaded;
- only the System container with limited options (only Logs and Platform components) is displayed in the Workspace Tree;
The device's Workspace Tree in the emergency mode
- the ALM LED is lit continuously;
- the iFnet runs with an IP/port taken from a flash storage;
Note: The flash storage must be synchronized to configuration slots when available.
- no authorization or credentials are taken from the flash storage (like IP/port).
When connecting to a device, which is in the emergency mode, a notification is displayed:
The emergency mode notification notice
Possible Actions
When the device enters the emergency mode, take one of a few possible actions:
- reboot;
- restore to factory defaults (restoring with S1 6th DIP switch): format the SD card (if available), restore default credentials, IP, mask, gateway, iFnet port;
- restore to defaults (restore in the iC Tool): remove files from the SD card (if available and formatted) excluding only files with IP, port, and credentials (libraries must be also removed);
- read logs from the SD card if available.