4-1SectionMovement of Data Carrier and Command Status
26
Auto Read/Write Function
Auto Command Processing: When the ID Controller has received an auto com-
mand, it does not respond to the host computer until the Data Carrier ap-
proaches. When the Data Carrier approaches, the communication line between
the Controller and the host computer becomes busy.
(Host computer) (ID Controller) (Data Carrier)
Auto command
Busy status
Busy status
Command end
Head
Head
Head
Response
Head
(Processing end)
Not approaching
Not approaching
(Data Carrier)
Communication
Read/Write
processing
1, 2, 3... 1. The host computer transmits an auto command to the R/W Head.
2. The ID Controller does not respond to the host computer until the Data Carri-
er approaches, and only at this time does the host computer become busy.
3. When the Data Carrier passes by the R/W Head, data is read or written.
4. After the processing has been completed, the ID Controller returns a re-
sponse to the host computer to indicating the end of processing.
For further details, refer to Appendix B.
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