4-1SectionMovement of Data Carrier and Command Status
25
Read/Write Function
Read/Write Command Processing: The read/write function is used for commu-
nication when the Data Carrier is motionless. Therefore, it must be confirmed
that the Data Carrier is at a specified position, i.e., in the communication area of
the R/W Head. If the Data Carrier is missing, the ID Controller returns a response
to that effect.
(Host computer) (ID Controller) (Data Carrier)
Command end
Response
Not approaching
Data Carrier
Stops
Data Carrier
Stops
Moves
Read/Write
command
Read/Write
processing
1, 2, 3... 1. The host computer confirms that the Data Carrier is at a specified position
and transmits a command to the ID Controller.
2. The ID Controller performs write or read processing in accordance with the
command.
3. After the processing is complete, the ID Controller returns a response to the
host computer to indicate that the processing has ended. The host comput-
er, on receiving the response, moves the workpiece (with a Data Carrier) on
the conveyor line.
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