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1
2
Transaction
Transaction
List Number
Length
*
* Upper left-hand rotary switch references a transaction
from the user's transaction table. The transaction list
number from the table is placed in byte 2 of the header.
Digit
1
2
Upper
Monitor
Right
Key
Rotary
( 1 ,2 ,or 3)
Switch
10
11
Digit
79
78
21
20
Figure 7.
2796 Data Entry as Assembled in the 2715 TCU
2796 Data Entry
A 2796 data entry as assembled in the 2715 TCU consists
of 18 digits of data plus transaction-header information (see
Figure 7):
Digit 1— Monitor key setting and type of DEU.
Digit 2— Setting of upper right-hand rotary switch.
Digits 3 through 12— Contents of card or badge. Blanks
are transmitted for these positions if a card or badge
is not entered as part of the data entry.
Digit 13— Setting of lower left-hand rotary switch.
Digit 14— Setting of lower right-hand rotary switch.
Digit 15 through 18-Setting of four rocker-thumbwheel
switches.
Note: Such information as device address, area station
address, and upper left-hand rotary switch setting are
Transaction Header (8 Bytes)
3
4
Area
Device
Station
Address
Address
V r
Binary
Data Entry (18 EBCDIC Digits)
4
3
71
72
13
14
12
13
Lower
80
Left
22
Rotary
Switch
5
6
Tens
Units
of
of
Hours
Hours
......
m m s
Time-of-Day (EBCDIC)
5
6
------------------ 1
i------------------
Card or Badge Columns
73
74
15
16
14
15
Rocker Thumbwheel Switches
Lower
Right
1
Rotary
Switch
also transmitted to the system controller. The system
controller constructs a transaction header from this
information and prefixes it to the transaction containing
the data entry.
D A T A E N T R Y U N IT T R A N S A C T IO N S E L E C T IO N
The combination of the area station's address, the data
entry unit's address, and the setting of the left-hand (upper
left-hand for 2796) rotary switch selects the proper trans
action list from the user's transaction-list table. The trans
action list provides the controls to process the data entry.
All 2795's assigned to a given AS must use the same
transaction list for corresponding rotary-switch settings
(transaction code). All 2796's assigned to a given AS must
7
8
Tens
Units
of
of
Minutes
Minutes
J
7
8
75
76
77
19
17
18
17
16
18
■
2
3
Data Entry Units
9
4
13
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