Disk Drive - ABB IRB 6400R Product On-Line Manual

3.4.5 Disk drive

The signal interface with the disk drive; TTL levels "0" <=> 0V, "1" <=> +5V.
X9
Pin
9
10
11 DSKCHG N
12
13
14
15
X9
Pin
9
10
11
12
13
14
15
Product Manual
A
RD N Read Data, pulses. Data pulses when reading the dis-
kette
WP N Write Protect, static active low. Indicates whether or
not the diskette is write protected.
Disk Change, static active low. Indicates whether or
not there is a diskette in the unit.
WD N Write Data, pulses. Data pulses when writing to the
diskette.
SSO N Side Select, static active low. Indicates which side of
the diskette is active.
DIRC N Direction in, static active low. Indicates that the
heads are to move inwards.
0V
C
IP N Index, pulses. One pulse per cycle, c. every 200 mil-
liseconds.
TR00 N Track 00, active low. Indicates that the heads are
located at track 0 of the diskette.
MO N Motor on, static low. Starts the motor in the selected
unit.
WG N Write Gate, pulses. Enables writing.
STEP N Step, pulses. Steps the heads in the direction indi-
cated by DIRC N.
HD N High Density, static active low. Indicates that a 1.44
MB diskette is in the unit.
0V
Troubleshooting Tools
Explanation
Explanation
37