Inverter Absolute Encoder Error Bit

When error [4.1055] occurs, the following message is displayed. From Param 1, you can identify which joint the error occurred on.

[4.1055] Robot inverter category

Inverter Absolute Encoder Error Bit
Param 1: Joint Number

Each joint has an absolute encoder that reports the joint's position. This error means the joint reported a fault in its absolute encoder.

Software versions in which this error is active

• M-Series, H-Series and P-Series — V2.12 and V3.4
• A-Series — not yet active

Poor contact or a fault in the absolute encoder parts inside the joint — the encoder cable, the encoder header or the joint's main board. These parts are inside the robot arm and need service.

• Turn the controller off and on again, and note whether the error returns.
• Note the joint number from Param 1, and any other codes shown with it.
• Check whether the robot collided or was repaired shortly before the error first appeared.

If the error returns, contact your distributor.

• Robot model and serial number
• Software version of the controller
• The error code with its Param value, all codes shown with it, and the date and time
• The controller log exported right after the error

• 4.1017 Absolute Encoder CRC Error
• 4.1049 Incremental Encoder Count Error
• 4.1050 Position Error between Encoders