Epson LQ 1050 User Manual - Page 165

Serial interface, Space 0 + 3V to + 27V

Get Epson LQ 1050 - B/W Dot-matrix Printer PDF manuals and user guides View all Epson LQ 1050 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 165 highlights

Interface Specifications Printing enabled/disabled signals and control conditions The table below shows the relationship between printing being enabled or disabled, and the on-line/off-line condition, the printer select signal (SLCT IN), and the receipt of data on/off control character, DC1/DC3. On-line (Indicator on) ON-LINE SLCT IN Low (J9/ interface) DCllDC3 ERROR (Data on/off control) DClIDC3 High (no effect) ON-LINE High DC1 Recv'd High ON-LINE High DC3 Recv'd High OFF-LINE High/Low DCl/DCB Low (no effect) (no effect) BUSY ACKNLG Printing (Disabled/ enabled) High/Low High/low High/Low High Pulsed ea. char. Pulsed ea. char. Pulsed ea. char. Not generated Enabled (normal cond.) Enabled *Disabled Disabled *Even though printing is disabled, data characters are received and acknowledged, since the printer is looking for another DC1 character, which would allow it to resume printing. Serial interface The LQ built-in serial interface is an RS-232C asynchronous interface with the following characteristics: Data format 1 start bit Data word length: 8 bits Odd, even or no parity 1 stop bit Signal level Mark (1) - 3V to - 27V Space (0) + 3V to + 27V Band rate 300, 1200, 4800, 9600 BPS 8-9

  • 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
  • 149
  • 150
  • 151
  • 152
  • 153
  • 154
  • 155
  • 156
  • 157
  • 158
  • 159
  • 160
  • 161
  • 162
  • 163
  • 164
  • 165
  • 166
  • 167
  • 168
  • 169
  • 170
  • 171
  • 172
  • 173
  • 174
  • 175
  • 176
  • 177
  • 178
  • 179
  • 180
  • 181
  • 182
  • 183
  • 184
  • 185
  • 186
  • 187
  • 188
  • 189
  • 190
  • 191
  • 192
  • 193
  • 194
  • 195
  • 196
  • 197
  • 198
  • 199
  • 200
  • 201
  • 202
  • 203
  • 204
  • 205
  • 206
  • 207
  • 208
  • 209
  • 210
  • 211
  • 212
  • 213
  • 214
  • 215
  • 216
  • 217
  • 218
  • 219
  • 220
  • 221
  • 222
Interface Specifications
Printing enabled/disabled signals and control conditions
The table below shows the relationship between printing being
enabled or disabled, and the on-line/off-line condition, the printer
select signal (SLCT IN), and the receipt of data on/off control
character, DC1/DC3.
On-line
SLCT
IN
(Indicator
on)
ON-LINE
Low
(J9/
interface)
DCllDC3
ERROR
BUSY
ACKNLG
Printing
(Data
on/off
(Disabled/
control)
enabled)
DClIDC3
High
High/Low
Pulsed
ea.
Enabled
(no
effect)
char.
(normal
cond.)
ON-LINE
High
DC1
Recv’d
High
High/low
Pulsed
ea.
Enabled
char.
ON-LINE
High
DC3
Recv’d
High
High/Low
Pulsed
ea.
*Disabled
char.
OFF-LINE
High/Low
DCl/DCB
Low
High
Not
Disabled
(no
effect)
(no
effect)
generated
*Even though printing is disabled, data characters are received and acknowledged, since the
printer is looking for another DC1 character, which would allow it to resume printing.
Serial interface
The LQ built-in serial interface is an RS-232C asynchronous
interface with the following characteristics:
Data format
1 start bit
Data word length: 8 bits
Odd, even or no parity
1 stop bit
Signal level
Mark (1) - 3V to - 27V
Space (0) + 3V to + 27V
Band rate
300, 1200, 4800, 9600 BPS
8-9