Receive Request Flags
The Receive Request Flags field gives the host additional controls over the serial input.
Bit (0 = LSB) Description 0 Clear Before Receive - Clear the serial input queue before receiving new incoming data. 1-7 Reserved
Flushing the input queue allows the EIP master to remove irrelevant data that was collected by the scanner.
Caution: If the "Clear Before Receive" bit is used with a receive timeout of zero (0), the scanner will respond with an "Object State Conflict" error. When using the "Clear Before Receive" bit, always specify a non-zero timeout so the device will have a chance to generate a response to any commands in the data field.