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Direct Data Interchange with the IP 240
Write initial and final track values
To change the initial value and final value for a track, you must load these two values into the
transfer buffer and then load the job request register with either 1n
of the track).
Table 11-5. Contents of the Transfer Buffer on Writing Initial
Offset
transfer
7
6
buffer
0
1
2
3
0
0
4
5
6
7
0
0
8 to 14
0
Write zero offset
To specify a zero offset (NVER), you must enter the zero offset value in the transfer buffer and
load the job request register with 19
Table 11-6. Contents of the Transfer Buffer on Writing a Zero Offset, Position Decoding Mode
Offset
tranfer
7
6
buffer
0
1
2
3
0
0
4 to 14
0
11-12
and Final Track Values, Position Decoding Mode
Bit
5
4
3
2
1
10
3
10
0
0
0
0
0
1
10
3
10
0
0
0
0
0
. . .
0
0
or 29
.
H
H
Bit
5
4
3
2
1
10
10
3
0
0
0
0
0
. . .
0
0
1
0
0
10
2
10
4
10
Sign for initial value
0
SG
SG=1
The initial value is negative.
SG=0
The initial value is positive.
0
10
2
10
4
10
Sign for the final value
0
SG
SG=1
The final value is negative.
SG=0
The final value is positive.
. . .
0
1
0
0
10
10
2
4
10
0
SG
SG=1 The zero offset is negative.
SG=0 The zero offset is positive.
. . .
0
or 2n
(where n=number
H
H
Description
Initial track value
Final track value
Description
Zero offset
Sign of the NVER
EWA 4NEB 811 6120-02a
IP 240
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