![]() ![]() ![]() This indicates a fault in the structure of remainder of a complex request, such as that the implied length is incorrect. For a controller with 100 registers, a request with offset 96 and length 4 would succeed, a request with offset 96 and length 5 will generate exception 02.Ī value contained in the query data field is not an allowable value for the server. More specifically, the combination of reference number and transfer length is invalid. The data address received in the query is not an allowable address for the server. If a Poll Program Complete command was issued, this code indicates that no program function preceded it. It could also indicate that the server is in the wrong state to process a request of this type, for example because it is unconfigured and is being asked to return register values. This may be because the function code is only applicable to newer devices, and was not implemented in the unit selected. The function code received in the query is not an allowable action for the server. The exception codes as explained in the Modbus specification are: Exception Code Please see the table below for a description of each possible error code. When a Magelis HMI is communicating to a Modbus device over Modbus TCP/IP or Modbus RTU, there are serveral different error codes that the PLC may return in the event of an exception. Vijeo Designer (all versions), Magelis series, XBTGT, HMIGTO, HMIGTU, HMISTO, HMISTU, HMIGK, iPC The Magelis HMI is showing an error "The PLC equipment has returned error code 0AH". ![]()
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