7197 Series II Owner’s Guide
Chapter 6: Commands
August
2011
149
Baseline State Request
This request tells the printer to send an Unsolicited Status Update message for all Sensors and States
supported by the firmware. This allows the Application, Driver, or Control to establish an initial
picture of the state of the printer.
ASCII:
GS DC1
n
Hexadecimal:
1D 11 FF
n
Decimal:
29 17 255
n
Value of n
0 or 1
Message To Printer (Hex): 1D 1E 1F – Causes the printer to fire off a series of USU messages to the
host to establish a baseline.
Unsolicited Messages
The following is the general message structure for the Unsolicited Status Update messages:
The Unsolicited Message will always consist of at least three bytes. The top 4 bits (7, 6, 5, 4) of
each byte will be an identifier that when compared to the bytes before and after it will identify the
byte as part of the three byte Unsolicited Status Update (USU) message. The remaining 4 bits (3, 2,
1, 0) will contain the information that is being passed to the host from the printer.
The lower 4 bits of the first two bytes when examined as continuous bits of a single number identify
the sensor or state for which USU message is reporting a change. The lower 4 bits of the last byte
will identify the state that is being reported to the host.
BIT
7 6 5 4
3 2 1 0
Byte
(
1
)
1 0 0 1
x x x x
Byte
(
2
)
1 0 1 0
y y y y
Byte
(
3
)
1 0 1 1
z z z z
The host can determine if any unsolicited 3-byte sequence from the printer is a USU message by
checking the upper 4 bits of the three bytes received. If the upper 4 bits match those of the USU
message, then the remaining lower 4 bits are to be interpreted as the information bits of a USU
message.
The information bits of a USU message are to be interpreted as follows:
The lower 4 bits of Byte (1) and Byte (2) should be combined in the following manner to constitute
an identifier value in the range of 0-255. This
identifier
then determines how the host should
interpret the
state value
of the lower 4 bits of Byte (3).
Combined Bits from Byte (1) and Byte (2) in high bit to low bit order:
Identifier Value by Bit Definition
7 6 5 4 3 2 1 0
x x x x y y y y
Summary of Contents for 7197 II SERIES
Page 5: ...v EMC 100 240 1 5 0 8 50 60 24 2 3 3 125 NCR NCR EMC 360 NCR EMC A A...
Page 7: ...vii A NCR NCR NCR A...
Page 35: ...7197 Series II Owner s Manual Chapter 2 Setting Up and Using the Printer 21 September 2011...
Page 37: ...7197 Series II Owner s Manual Chapter 2 Setting Up and Using the Printer 23 September 2011...
Page 38: ...7197 Series II Owner s Manual Chapter 2 Setting Up and Using the Printer 24 September 2011...
Page 253: ...7197 Series II Owner s Guide Appendix B Print Characteristics 228 Februrary 2012 Code Page 932...
Page 272: ...7197 Series II Owner s Guide Appendix B Print Characteristics 247 Februrary 2012...
