NCR 7156, Руководство пользователя

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Chapter 6: Commands 7156 Owner’s Guide
September 1997 86
If any of the status items listed above are selected, ASB is enabled and the printer
automatically transmits 4 status bytes whenever the selected status changes. If no status is
selected, ASB is disabled.
All four status bytes are transmitted without checking DSR.
If the error status is enabled, a change in any one of the following conditions will trigger
the ASB:
•
Receipt cover or cassette cover opened
•
Knife error
•
Carriage motor jam
•
Out-of-range printhead temperature
•
Out-of-range voltage
•
Receipt paper exhaust if trying to print on the receipt
When Auto Status Back (ASB) is enabled using this command, the status transmitted by
other commands and the ASB status be differentiated according to the information found
in “Recognizing Data from the Printer,” (in the “Real Time Commands” section later in this
chapter).
The status bytes to be transmitted are described in the following four tables.
First Byte (Printer Information)
Bit Off/O
n Hex Decimal Status for ASB
0 Off 00 0 Not used. Fixed to off.
1 Off 00 0 Not used. Fixed to off.
2 Off
On 00
04 0
4 One or both cash drawers open.
Both cash drawers closed.
3 Off
On 00
08 0
8 Not Busy at the RS232C interface.
Printer is Busy at the RS232C interface.
4 On 10 16 Not used. Fixed to on.
5 Off
On 00
20 0
32 Receipt and cassette cover both closed.
Receipt or cassette cover open.
6 Off
On 00
40 0
64 Paper feed button is not pressed.
Paper feed button is pressed.
7 Off 00 0 Not used. Fixed to off.
Second Byte (Error information)
Bit Off/O
n Hex Decim
al Status for ASB
0 - - - Undefined
1 - - - Undefined
2 Off
On 00
04 0
4 No mechanical error
Mechanical error occurred.
3 Off
On 00
08 0
8 No knife error.
Knife error occurred.