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'l'ABLE 3-3.
COMMANDS (CONT'D)
Command
Definition/Function
ssa
(Cont'd)
!!!!!!.
Device Failure
Device Protected
DLI Error
Positioner Busy
83318200
C
Meaning
Error has been detected in
drive.
One of the following
occurred:
1. Any error of OS2 (see Table
4-7).
2. Bits 2 3 and 27 of DS3.
3. Bit 2 0 of DSS.
4. Pack Unsafe FF set.
This
lights the CHECK indicator.
This condition is set by
any of the following:
a. Read or Write while not
On Cylinder.
b. Voltage fault of ±Sv,
±20v, or -l6v power.
c. Dibits lost for more than
200 milliseconds.
d. Simultaneous Read and
Write.
e. CUrrent Fault (see DS2,
bits 24
thru
2 7 ).
Any of the above conditions
will raise the FLT line.
WRITE PROTECT indicator is on.
Interface error has been de-
tected by dQ. ve.
One of the
following has occurred:
1. Any error of OSlo
2. Bit 2 6 of DS3.
3. Select Fault has occurred.
Controller attempted any
command other than Summary
Status Request or Seize
before first successfully
seizing the drive.
Any of the above conditions
will raise the FLT line.
Positioner is in motion.
One
of the following conditions
exist:
1. Not Unit Ready and Not Stop
(typically a First Seek
sequence) .
3-33
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