Honeywell BR3C9 Operation Manual page 84

Command
Detailed Status
Byte 5 (DSB5)
Tag 20
Detailed Status
Bytes 6,7
(DSB6,7)
Tags 2E,2F
Read Difference
Counter Upper
Tag 30
Read Difference
Counter Lower
Tag 31
Tag 32
Increment Sector
Counter Tag
33
83318200 A
TABLE 3-3. COMMANDS (CONT' 0)
Definition/Function
i.An
input information command.
2. This command causes the drive to present a byte of data that,
except for bit 2; concerns the status of the drive at the time
the command was executed. The status is returned on the bi-
directional data lines.
3.
The bidirectional data lines are interpreted as follows:
~
Meaning
Write and Read Both Write Enable and Read
Enable were up simultaneously.
This sets Pack Unsafe FF to
light the CHECK indicator and
to set Device Failure (SSR bit
2 1 ) ..
Read Clock Offset Status bit indicating that
read circuit is under influ-
ence of ARC or RCC command.
Positioner Offset Status bit indicating that
positioner is under influence
of a Shift Positioner Out or
In command.
Heads Retracted Status bit indicating that
heads are unloaded as sensed
by heads loaded switch.
Not Used
These tags are recognized and acknowledged by the drive but initiate
no drive functions.
1. A test and diagnostic command requiring prior acceptance of a
Tag IF.
2. Causes the drive to gate bits 2
8
and 2 9 of Difference Counter
onto bits 2
0
and 21 of bidirectional "data lines.
1. A test and diagnostic command requiring prior acceptance of a
Tag IF.
2. Causes the drive to gate bits 2
0
through 27 of Difference coun-
ter onto bidirectional data lines.
This tag is recognized and replied to by the drive but initiates
no drive operations.
1. A test and diagnostic command requiring prior acceptance of a
Tag IF.
2. Causes the drive to increment its Sector counter by 1. The
counter and its register are reset by Set Diagnostic Escape
(Tag IF). With Tag lF up the index and dibits input to the
counter is disabled. The counter value is read by an Angular
Position In Command (Tag 24).
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