Code PRIO-106: Device with port is off-line
Issue Description & Safety Warning
The Fanuc R-30i Series Robot Controller has triggered a critical Device with port is off-line alarm. Immediate attention from a qualified operator or maintenance technician is required to prevent secondary damage to the equipment or spoiled parts during the manufacturing cycle. Always ensure standard safety and LOTO procedures are followed before accessing electrical cabinets.
Official Troubleshooting Steps
Cause: An attempt was made to access a port assigned to a device which is offline. For DeviceNet ports, troubleshoot as follows: This might be caused by an error or the device being manually set offline. Remedy: First, determine the port type and number being accessed. Then use the appropriate Digital I/O CONFIG screen to determine the DeviceNet board and device MAC-Id to which the port is assigned. Check the status of the DeviceNet board using the Digital I/O DeviceNet screen. If the status field for the board is OFF, set it ONLINE. If the status is ERROR, check the following: 1.) The daughter board is installed on the Interface board. 2.) There is power on the network. After the problem is corrected, use the Digital I/O DeviceNet DEV LST screen to set the board ONLINE. If the board is ONLINE, check the DEV LST screen entry for the indicated device. If the status field for the device is OFF, set it ONLINE. If the status is ERROR, check the following: 1. The device is physically present on the network. 2. The baud rate is set correctly. 3. There are no devices with duplicate MAC-Id's on the network. 4. The device with the required MAC-Id is the device type indicated in the DEV LST screen. Once the problem is corrected, use the DEV LST screen to set the device ONLINE.
Source: FANUC Robot R-30iA Alarm Code List Operator's Manual
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Fanuc R-30i Series Robot Controller Alarms
Fanuc controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code PRIO-106 on the R-30i Series Robot Controller identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Fanuc's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 6553 Fanuc R-30i Series Robot Controller codes.
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