Fujitsu M2361A Customer Engineering Manual page 123

(c) State
3
When the INSTG state occurs, DESQLI and DESQL2 are set in this
order and the operation enters state
3.
When DESQL2 is set, the
'disk starts rotation. When the state 3 signal (ST3) goes high,
the Start Timer signal (STTMR) is set high, causing the timer to
be started. If the Run State Good signal (RNSTG
=
*HALRM'
MTRSP) re~ains low about 60 seconds after it has started
(EN60S), DESQCKL and DESQL4 are set and the operation enters
state
7.
(d)
State 2
If RNSTG is high when EN25S is high in state 3, DESQLI is reset
and the operation enters state 2.
The state 2 signal (ST2) goes high, causing the sequence RTZ
(SQRTZ) operation to be started.
(e) State 6
The interrupt signal (ACCMP) generated upon completion of the
SQRTZ operation sets DESQL4 and the operation enters state 6.
In this state, the Unit Ready signal may be sent to the
controller.
If one of the following conditions occur during state 6, DESQLI ,
is set and the operation enters state
7:
I The START switch on the operator panel is set to OFF.
2
The HTRSP signal goes low.
3 The HALRM signal goes high.
b. DE Stop Sequence States
4 -
52
(a) State 7
When the state 7 signal goes high, the ANGHM signal is set high,
causing the head to start moving to the CSS area (GO HOME).
(b)
State 5
The interrupt signal (GHCMP) generated upon completion of the Go
Home operation resets DESQL2, and the operation enters state 5.
The state
5
signal (STS) causes the timer to be started.
(c) State 4
The ENIIS signal generated upon completion of the timer
operation resets DESQLI, and the operation enters state
4.
(d) State 0
The state 4 signal (ST4) resets DESQL4, and the operation enters
state 0 to indicate the end of the DE Stop Sequence.
B03P-482S-0002A ••. OI