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TABLE 3-3.
COMMANDS (CONT'D)
Command
Definition/Function
DSBl (Cont'd)
Detailed Status
Byte 2 (DSB2)
Tag
2A
3-36
!!!!.
Invalid Co1llllli1nd
CODIIIIaIld Parity
Error
1.
An
input information COJlllllaJ1d.
Meaning
1.
A diagnostic command was
issued prior to a Set Diag-
nostic Escape (Tag
IF).
2. A no-op COJlllllaJ1d (other
than
codes 32,34,35,36, or
37
during Set Diagnostic Es-
cape) was received while in
any
mode.
•
Command did not have odd par-
ity at rise of Device Command
Strobe.
2. This command causes the same function as DSBl except for the
following:
•
All errors
in
this status byte set Summary Status Byte
bit 21 •.
•
All errors in this status byte are reset by the DSB2
command,
the
Device Initialize signal or the CHECK switch/
indicator.
•
The bidirectional data line decode is differento
3.
The bidirectional data line decode is as follows:
ill
!!!!!.
2 0
Loss of Voltage
Not Used
Spindle Speed
Loss
Meaning
Anyone of the following dc
voltage errors occurred:
1. +5v less than +4.S25v.
2. -5v more posi ti ve than
-4.825v.
3.
+20v less than +lSv.
4. -20v more positive than
-lSv.
5. -16v more positive than
-12v.
Any of these errors will set
Pack Unsafe
FF
and light in-
dicator.
In addition, insuf-
ficient -l6v power will cause
automatic emergency retract
of positioner.
Spindle speed dropped below
2700
rpm after heads were
~oaded.
Heads unload.
S3318200
A
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