1774-2-9 Communication SequenceThis section describes sequence of the transmission and reception for either command or response databetween the external device and laser markerNote that the sequence of the transmission and reception is activated differently for interruption prohibited stateand interruption allowed state.■ Normal Transmission/Reception Sequence for Data Setting andOperation DirectionThe following figure shows the sequence when the command and setting transmitted from the external deviceto the laser marker is correct.■ Normal Sequnece of Setting Data ReadoutThe following figure shows the sequence when the readout of the setting data (subcommand: ‘R’) transmittedfrom the external device to the laser marker is correct.■ Transmission/Reception Sequence for Abnormal CommandThe following figure shows the sequence when the command sent to laser marker from the external device isabnormal.■ Reception TimeoutThe laser marker performs the reception timeout check (monitoring the time for completely receiving dataranging from the top to the bottom of the command while a command is received) when receiving the com-mand sent from the external device.The time of the reception timeout is 10 seconds. If the command is not received completely from the top to thebottom of the data within this time, it is judged that some trouble has occurred either on the external device oron the transmission route, and all transmission/reception processing is stopped completely.When the reception timeout occurs, the data being received is discarded.• In case of sending command from the external device continuously, be sure to check thereception of the response from the laser marker, and send the command.External DeviceCommand (Command/Setting Data)Normal Reception ResponseReceiveSendReceiveSendLaser MarkerExternal DeviceCommand (Readout Setting Data)Readout ResponseReceiveSendReceiveSendLaser MarkerCHECKExternal DeviceCommand (Data Setting, Operation Indication,Setting Data Readout, etc.)Abnormal Reception ResponseReceiveSendReceiveSendLaser Marker
