Panasonic LP-310 - Communication Sequences; Transmission;Reception Sequences

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4-2-9 Communication Sequence
This section describes sequence of the transmission and reception for either command or response data
between the external device and laser marker
Note that the sequence of the transmission and reception is activated differently for interruption prohibited state
and interruption allowed state.
■ Normal Transmission/Reception Sequence for Data Setting andOperation Direction
The following figure shows the sequence when the command and setting transmitted from the external device
to the laser marker is correct.
■ Normal Sequnece of Setting Data Readout
The following figure shows the sequence when the readout of the setting data (subcommand: ‘R’) transmitted
from the external device to the laser marker is correct.
■ Transmission/Reception Sequence for Abnormal Command
The following figure shows the sequence when the command sent to laser marker from the external device is
abnormal.
■ Reception Timeout
The laser marker performs the reception timeout check (monitoring the time for completely receiving data
ranging 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 the
bottom of the data within this time, it is judged that some trouble has occurred either on the external device or
on 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 the
reception of the response from the laser marker, and send the command.
External Device
Command (Command/Setting Data)
Normal Reception Response
Receive
Send
Receive
Send
Laser Marker
External Device
Command (Readout Setting Data)
Readout Response
Receive
Send
Receive
Send
Laser Marker
CHECK
External Device
Command (Data Setting, Operation Indication,
Setting Data Readout, etc.)
Abnormal Reception Response
Receive
Send
Receive
Send
Laser Marker