Lexmark MX431 Printer Languages and Interfaces Technical Reference - Page 144

Serial errors, Serial computer configuration recommendations RS-232C

Get Lexmark MX431 PDF manuals and user guides View all Lexmark MX431 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 144 highlights

Printer interfaces 144 RTS DTR DSR XMT RXD 1 2 XON 4 3 Receive Data Valid XOFF XON 5 6 1 The RTS signal is driven active as long as power is supplied to the printer. 2 The DTR signal becomes active at the completion of initialization. 3 The printer considers data received invalid when DSR is low and discards the data. (This is conditional depending on the setting of Honor DSR.) 4 After you power on the printer and DTR is active, the printer sends an XON signal to the computer (DC1 control or X'11'). However, the computer does not need to detect this initial XON before sending data to the printer, because the printer can be powered on before the computer or terminal. 5 The printer sends an XOFF signal (DC3 control or X'13') to request that data transmission end until the buffer clears. About 640 free bytes remain in the buffer at this time. If the computer continues to send data after the printer sent an XOFF signal, then data could be lost. 6 The printer sends an XON signal to the computer when the buffer space is again available. The serial interface is ready to receive more data. Serial errors The printer places an underscore character in the link buffer when it detects an error. Some printers also display serial errors on the control panel or through MarkVision Enterprise as attendance messages. Examples of these errors are 54 Standard Serial Error and 54 Serial Option [x] Error (x represents the number of the serial port). Serial errors that do not generate such an error message are: • Serial Break • Framing error received simultaneously as a Break • Turning on an IBM-compatible personal computer connected to the printer Serial computer configuration recommendations (RS-232C) For correct operation of the serial interface, configure identically your printer and your computer operating system. The following is an example of how to configure DOS for the printer using serial DTR protocol: DOS: From the DOS prompt, enter the following commands: mode comy:9600,n,8,1,p mode lptx :=comy where x equals 1, 2, or 3, and y equals 1 or 2. Include these two command statements in the AUTOEXEC.BAT file on the computer so they run each time your system starts operating.

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
  • 143
  • 144
  • 145
  • 146
  • 147
  • 148
RTS
DTR
DSR
XMT
RXD
Receive Data Valid
1
2
4
3
5
6
XON
XOFF
XON
1
The RTS signal is driven active as long as power is supplied to the printer.
2
The DTR signal becomes active at the completion of initialization.
3
The printer considers data received invalid when DSR is low and discards the data. (This is conditional
depending on the setting of Honor DSR.)
4
After you power on the printer and DTR is active, the printer sends an XON signal to the computer (DC1
control or X'11'). However, the computer does not need to detect this initial XON before sending data to the
printer, because the printer can be powered on before the computer or terminal.
5
The printer sends an XOFF signal (DC3 control or X'13') to request that data transmission end until the buffer
clears. About 640 free bytes remain in the buffer at this time. If the computer continues to send data after
the printer sent an XOFF signal, then data could be lost.
6
The printer sends an XON signal to the computer when the buffer space is again available. The serial
interface is ready to receive more data.
Serial errors
The printer places an underscore character in the link buffer when it detects an error. Some printers also display
serial errors on the control panel or through MarkVision Enterprise as attendance messages. Examples of these
errors are
54 Standard Serial Error
and
54 Serial Option [x] Error
(x represents the number
of the serial port). Serial errors that do not generate such an error message are:
•
Serial Break
•
Framing error received simultaneously as a Break
•
Turning on an IBM-compatible personal computer connected to the printer
Serial computer configuration recommendations (RS-232C)
For correct operation of the serial interface, configure identically your printer and your computer operating
system. The following is an example of how to configure DOS for the printer using serial DTR protocol:
DOS:
From the DOS prompt, enter the following commands:
mode comy:9600,n,8,1,p
mode lptx :=comy
where
x
equals 1, 2, or 3, and
y
equals 1 or 2.
Include these two command statements in the AUTOEXEC.BAT file on the computer so they run each time
your system starts operating.
Printer interfaces
144