A.4 Commands

 

7

6

 

5

4

3

2

1

0

 

 

 

 

 

 

 

 

 

 

 

 

Byte 0

 

 

 

 

Operation code X’1D’

 

 

 

 

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Logical unit number

 

PF

(Reserved)

SLFTST

D0

U0

 

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(Reserved)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3(MSB)

4

 

 

Parameter list length

 

 

 

 

 

 

 

 

(LSB)

 

 

 

5

 

 

 

 

 

 

 

Control byte

 

 

 

 

 

 

 

 

 

 

 

a.PF (page format) : Byte 1 This scanner ignores PF.

b.SLFTST (self test) : Byte 1 This value is 1 on this scanner.

c.DO (device offline), UO (unit offline) : Byte 1 This scanner ignores DO and UO.

d.Parameter list length: Bytes 3 to 4

This scanner does not support parameter list length.

(2)Contents of self-test

The contents of self-test shall be an equivalent of NOP (Non Operation), provided that CHECK CONDITION is reported if error information is withheld in the unit.

(3)Response

This scanner reports as follows:

a.Normal

The GOOD status is returned.

∙ Status: B’00000’ (GOOD)

∙Sense key: X’0’ (NO SENSE)

b.Abnormal

If error information is being withheld, the following status is returned:

∙Status: B’00001’ (CHECK CONDITION)

∙Sense key: Error information being withheld

Appendix A-47