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Below is a list of the Modbus error codes for the EGX300.
|MODBUS EXCEPTION 01||Illegal function. The function code received in the query is not an allowable action for the server or slave.|
|MODBUS EXCEPTION 02||Illegal data address. The data address received in the query is not an allowable address for the server or slave.|
|MODBUS EXCEPTION 03||Illegal data value. A value contained in the query data field is not an allowable value for the server or slave.|
|MODBUS EXCEPTION 04||Slave device failure. An unrecoverable error occurred while the server or slave was attempting to perform the requested action.|
|MODBUS EXCEPTION 05||Acknowledge. The server has accepted the request and is processing it, but a long duration of time will be required to do so.|
|MODBUS EXCEPTION 06||Server device busy. The server is engaged in processing a long-duration program command. The client should retransmit the message later when the server is free.|
|MODBUS EXCEPTION 07||Negative acknowledge. The slave cannot perform the program function received in the query.|
|MODBUS EXCEPTION 10||Gateway path unavailable. Usually means that the gateway is incorrectly configured or overloaded.|
|MODBUS EXCEPTION 11||Gateway target device failed to respond. Usually means that the device is not present on the network.|
|INVALID DEVICE ADDRESS ERROR|
|INVALID REGISTER ADDRESS ERROR|
|BAD CRC ERROR|
|UNKNOWN COMMAND ERROR|
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