timeout error from occurring in the client (or master). The client (or master) can next issue a Poll Program Complete message to determine if processing is completed. Specialized use in conjunction with 06 43405 SLAVE DEVICE BUSY programming commands. The server (or slave) is engaged in processing a long–duration program command. The client (or master) should retransmit the message later when the server (or slave) is free. The slave cannot perform the program 07 43406 NEGATIVE function received in the query. This code is ACKNOWLEDGEMENT returned for an unsuccessful programming request using function code 13 or 14 (codes not supported by this interface). The master should request diagnostic information from the slave. NOTE: This exception code is for function codes not supported by this interface, but is included to be fully compatible with all Modbus exceptions. Specialized use in conjunction with function 08 43407 MEMORY PARITY ERROR codes 20 and 21 and reference type 6, to indicate that the extended file area failed to pass a consistency check. The server (or slave) attempted to read record file, but detected a parity error in the memory. The client (or master) can retry the request, but service may be required on the server (or slave) device. Specialized use in conjunction with 10 43408 GATEWAY PATH gateways; indicates that the gateway was UNAVAILABLE unable to allocate an internal communication path from the input port to the output port for processing the request. Usually means that the gateway is not configured correctly or overloaded. Specialized use in conjunction with 11 43409 GATEWAY TARGET DEVICE gateways; indicates that no response was FAILED TO RESPOND obtained from the target device. Usually means that the device is not present on the network. Indicates that the CRC contained in the 21 43410 Response CRC did not match response packet does not match the CRC calculated CRC calculated by the interface after receiving the packet. NOTE: This exception code is not standard Modbus and is provided by the interface so that a CRC mismatch will be handled as if it is an exception. Indicates an undefined exception occurred. ?? 43411 Unknown Error This should never occur, but will be handled by the interface as if a known exception occurred.
timeout error from occurring in the client (or master). The client (or master) can next issue a Poll Program Complete message to determine if processing is completed. 06 43405 SLAVE DEVICE BUSY Specialized use in conjunction with programming commands. The server (or slave) is engaged in processing a long–duration program command. The client (or master) should retransmit the message later when the server (or slave) is free. 07 43406 NEGATIVE ACKNOWLEDGEMENT The slave cannot perform the program function received in the query. This code is returned for an unsuccessful programming request using function code 13 or 14 (codes not supported by this interface). The master should request diagnostic information from the slave. NOTE: This exception code is for function codes not supported by this interface, but is included to be fully compatible with all Modbus exceptions. 08 43407 MEMORY PARITY ERROR Specialized use in conjunction with function codes 20 and 21 and reference type 6, to indicate that the extended file area failed to pass a consistency check. The server (or slave) attempted to read record file, but detected a parity error in the memory. The client (or master) can retry the request, but service may be required on the server (or slave) device. 10 43408 GATEWAY PATH UNAVAILABLE Specialized use in conjunction with gateways; indicates that the gateway was unable to allocate an internal communication path from the input port to the output port for processing the request. Usually means that the gateway is not configured correctly or overloaded. 11 43409 GATEWAY TARGET DEVICE FAILED TO RESPOND Specialized use in conjunction with gateways; indicates that no response was obtained from the target device. Usually means that the device is not present on the network. 21 43410 Response CRC did not match calculated CRC Indicates that the CRC contained in the response packet does not match the CRC calculated by the interface after receiving the packet. NOTE: This exception code is not standard Modbus and is provided by the interface so that a CRC mismatch will be handled as if it is an exception. ?? 43411 Unknown Error Indicates an undefined exception occurred. This should never occur, but will be handled by the interface as if a known exception occurred.
PI_ModbusS_4.0.7.61.docx