Xerox 7120 - Page 17

CONTROLLING SYITEM ACTIONS
I Set Unc'cal End lndka.a'.1 '"'4o-------~
!~td~~t:~:r~u~:c~;::ns- I
mission Data Error, and r - - -
Unusual End indicators. I
I
Advance to "busy"
condition.
I
I
CARD READER ACTIONS
Stop transport motor,
light FEED' indicator,
and switch to "not
operational" stote.
Stock cord in error
stocker, 1;9~t READ'
--+------------'-----1 indicator, and sw;tch to
"not operational" state.
If ~evious column data not
sent when next column is at
read stotion, 0 data overrun
condition has occurred.
Set TransrniHion Doto
Error indicator.
t---------
Set Incorrect Length
indicator.
I
Set ChaMel End
indicator.
1-------
IFor Model 7120, FAULT indicator.
ttModel 7140 reads each cord column twice and then
compores the dato. If dota read from read stotions is
not the same, Read Verify and Transmission Data error
indicators ore set,
Stop tramport motor ond
switch to "not opera-
tional" state,
Wait for next 5[0 (or
next order, if controlling
sy$tem command chains),
Figure 3. Controlling System/Card Reader Actions
Programming Considerations 11
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