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Appendix MV600/V620 ID Controller Protocol
385
Polling Auto-read (Hexadecimal) (Sequence No. 514)
This sequence is used when the number of Heads to be read from the Carrier is from 1 to 8.
Send Data Word Allocation (2nd Operand of PMCR)
First word of send
data
Number of Heads
+0
+1
+2
+3
+4
+5
+(4(N–1)+2)
+(4(N–1)+3)
+(4(N–1)+4)
+(4(N–1)+5)
CH 1
Number of send data words
(Undefined)
Unit No.
(Undefined)
Head CH No.
Leading address No.
(Undefined)
Read bytes
~ ~
(Undefined)
Unit No.
(Undefined)
Head CH No.
Leading address No.
(Undefined)
Read bytes
CH N
* N: Number of Heads
Offset Contents (data format) Data
+0 Number of send data words
(4 digits BCD)
0006 to 0034
+1 Number of Heads
(4 digits BCD)
0001 to 0008
+(4(N–1)+2) Unit No. (2 digits BCD) Arbitrary (However, there is a limit for the
maximum Unit No. depending on the model)
+(4(N–1)+3) R/W Head CH No.
(1 digit BCD)
R/W Head CH 1 designation: 1
R/W Head CH 2 designation: 2
+(4(N–1)+4) Leading address No.
(4 digits Hexadecimal)
0000 to FFFF
+(4(N–1)+5) Read bytes
(2 digits Hexadecimal)
If number of Heads is 2 or less
01 to 3C (1 to 60 bytes)
If number of Heads is 4 or less
01 to 18 (1 to 24 bytes)
If number of Heads is 8 or less
01 to 0A (1 to 10 bytes)
N: Number of Heads
Receive Data Word Allocation (3rd Operand of PMCR)
None.
Note 1. Execute Sequence No. 514 before executing Sequence No. 515, 516, 517.
2. Execute Sequence No. 544 (Polling Auto-read Command Processing Cancel) to cancel the polling
auto-read.
Polling Auto-read Sub-command (Hexadecimal/2) (Sequence
No. 515)
This sequence is used when the maximum number of Heads to be read from the Carrier is 2. Up to 60 bytes of data
can be read for each Read/Write Head.
Send Data Word Allocation (2nd Operand of PMCR)
The send data word allocation is similar to that of Sequence No. 505 (Read (Hexadecimal/2)). However, the lead-
ing address No. and number of read bytes are not used and will be the value specified for sequence #514.
Receive Data Word Allocation (3rd Operand of PMCR)
The receive data word allocation is similar to that of Sequence No. 505 (Read (Hexadecimal/2)).
Note 1. Execute Sequence No. 514 before executing Sequence No. 515.