8733 Fatal bus error

Description

Refer to Diagnostic class (standard): 3

Further bus communication is not possible due to a detected bus error.

NOTE: No data exchange with bus terminal BT-4/ENC1. Position loss of the master encoder connected to bus terminal BT-4/ENC1.
 CAUTION
POSITION LOSS DUE TO SERCOS BUS ERROR
Only acknowledge the diagnostic message after reinitialization or homing.
Failure to follow these instructions can result in injury or equipment damage.

If necessary, use the function FC_SysReset() or FC_PrgResetAndStart().

Cause

Solution

Detected wiring error: Incorrect bus topology.

Verify and correct or replace if necessary the terminals, transmission lines, and so on.

EMC errors found.

Verify and correct or replace if necessary the wiring and EMC protection.

Ext. diagnosis

Meaning

asynchronous

A synchronization error is detected. The touchprobes on the BT-4/DIO1 are not working.

Verify the jumper cable that connects the controller to the optional module PN-4 (in the controller).

clock miss

A communication error is detected in PacNet.

This may be due to various causes:

  • PacNet loop not closed

  • PacNet terminating plug is missing

  • A module connected to PacNet is inoperable (for example, no power)

Verify the PacNet loop and the modules in the loop.

Cause

Solution

Sercos cycle time 4 ms and PacDrive LMC-FPGA version < V0x02 (x = Hardware-ID, for example Id=2 -> FPGA version = V0202)

Update PacDrive LMC-FPGA version to at least version V0x02