Direct Seek Flow Chart - Honeywell BR3C9 Operation Manual

00
w
W
....
00
N
o
o
>
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I
U1
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<D
CONTROLLER
ISSUES COL
COMMAND AND
LOWER
I
SITS Of
NEW CYLI DER
ADDRESS 160)
NEW CYLINDER
ADDRESS LOADED
INTO UNIT
CYLINDER ADDlfSS
REGISTER
CONTROLLER
ISSUES SFL/SRL
COMMAND AND
LOWER I SITS OF
DlffE~ENCE
(SFL
& 150
COMPLEMENT OF
SEEK LENGTH
ENTERS
DIffERENCE
COUNTER (POSI-
TION ERROR)
(361 )
NOTE:
<D
®
VALUES PROVIDED IN THIS BLOCK
ASSUMES fORWARD SEEK FROM
CYL 10 TO CYL 160, HEAD 5
SEQUENCING OF SIGNALS NOT RELEVANT TO
~:I~h/~~~~~
.
TH~~ ~~t ~~=c:~~l ~~~T
OR IF' SFL PRECEDES SF'U, INVALJO
COMMAND SEQUENCE (DSSI bit 2~) IS SET.
G)
CONTROlUR
ISSUES HOU/HOL
COMMANDS AND
NEW HEAD
NuttIER (5)
ISSU£S COU Of
NEW CYLINDER
AODItn
TO UNIT
Figure 3-23. Direct Seek Flow Chart (Sheet 1 of 2)
SUMMING AMPLIFIER
PROVIDES NEGATIVE
POSITION ERROR
SIGNAL TO VOICE
COIL AMPLIFIER
TO CAUSE FORWARD
MOTION
C ) (SHEET 2)
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