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7197 Series II Owner’s Guide
Chapter 6: Commands
August
2011
152
Printer Firmware Implementation Considerations
The printer firmware will constantly monitor the states listed above. Once the
Enable USU
command has been received, from that time forward until the
Disable USU
command is received,
the printer firmware should transmit a USU message anytime there is a change to a state. When
multiple messages need to be transmitted, there should be a delay of at least 100ms between
messages.
The current state of the USU mechanism Enabled or Disabled should be maintained in the non-
volatile memory. If the printer is reset or power-cycled, and the USU mechanism is in the Enabled
state based on the value in non-volatile memory, the printer should transmit the current status of all
Sensor and State information in the same manner it does in response to a
Baseline State Request
.
This transmission should be performed once the power-up initialization of the printer has been
completed, and the communications channel has been established.
The purpose of the transmission after power-up is to handle the case of the printer entering an error
state that requires a reset, or power-cycle of the printer to correct it. Unless the current status of
Sensor and State information is transmitted to the host, the controlling software on the host might be
unaware of any changes in status resulting from the reset or power-cycle. The host software would
remain in an error state unless it polled the printer for status information.
Содержание 7197 II SERIES
Страница 1: ...NCR 7197 Thermal Receipt Printer Series II Owner s Manual B005 0000 2068 Revision B February 2012...
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Страница 35: ...7197 Series II Owner s Manual Chapter 2 Setting Up and Using the Printer 21 September 2011...
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Страница 230: ...7197 Service Manual Appendix C Ordering Paper and Supplies August 2011 205 TCP IP screen SNMP Screen A A...
Страница 231: ...7197 Service Manual Appendix C Ordering Paper and Supplies August 2011 206 Other Screen Reset Screen B A...
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Страница 308: ...B005 000 2068 Issue 1 0 1102 NCR is the name and mark of NCR Corporation 2002 NCR Corporation Printed in U S A...