DOC-0017-07-EN: AC20 Series - EtherCAT Option 
  DOC-0017-07-EN-B 04.04.2023   47 (58) 
11 Diagnostic Event 
Configuration problems can often be identified by looking at the Run and Error LEDs and from the 
EtherCAT State and Comms Diagnostic 0775 parameters. Under normal operating conditions the Comms 
diagnostic parameter should indicate OK. Other values are summarized in the Diagnostic Parameters 
section. 
 
Hardware Mismatch  
Diagnostic = HARDWARE MISMATCH: 
The required option does not match the actual fitted option.  
No option is fitted but one is required. 
 
Invalid Configuration  
Diagnostic = INVALID CONFIGURATION: 
Invalid read or write process data mapping 
Invalid communication settings  
 
Diagnostic = MAPPING FAILED: 
Attempting to map a parameter that does not exist. 
Attempting to map a configuration parameter.  
Attempting to map a read-only parameter to the read process data.  
 
Other Diagnostics 
Diagnostic = EXCEPTION : 
Module has gone into an unrecoverable exception state 
 
Diagnostic = UNSUPPORTED OPTION: 
The fitted option is not supported by the drive 
 
Diagnostic = NOT RESPONDING: 
no initial response from the option 
 
When a diagnostic event is entered a new entry is created in object entry 1003h (pre-defined error field) 
The Error Register (object 1001h) is set with the corresponding bit information. 
 
 
The EMCY Object is sent to the network with the following information:  
 
 
Code 
CAN controller signaled a lost message 
CAN controller reached the warning limit due to error frames. 
A received PDO was smaller than specified by the valid mapping table 
The DLC of a received PDO exceeded the length specified by the mapping table. 
An error control event has occurred (either a life guarding or heartbeat event). 
CAN controller has recovered from a BUS OFF state. 
COB-ID collision detected. 
Process data remap was NAKed by the host application. No valid process data map 
available.