45
Connecting a Bar Code Reader
Section 3-4
S
About RS/CS control
During bar code reading, the NT31/NT31C performs RS/CS control. When the
“Input Method” setting of the NT31/NT31C is set to “Auto”, the RS signal is
turned OFF, prohibiting the next input, until the read data has been notified to the
host.
Because of this, when the “Auto” setting is made, the next input is not possible
until the data has been notified to the host.
However, when the setting is “Auto” and the RS/CS signals of the cable are
shorted, RS/CS control is ineffective. Consequently, data input from the bar
code reader to the NT31/NT31C is updated regardless of whether or not the data
is notified to the host.
For details, refer to the instruction manual for the bar code reader used.
3-4-3
Data Format
The data format for communication when using the bar code input function of the
NT31/NT31C is shown below.
Data
Data
Data
STX
ETX
(03
H
)
(02
H
)
The characters which are effective as data are hexadecimal codes from 20 to 7F
H
,
and the maximum data length is 40 bytes.
Data which does not follow the data format described above is invalidated and dis-
carded.
Summary of Contents for NT31 Series
Page 1: ...Cat No V043 E1 2 Programmable Terminal NT31 31C OPERATION MANUAL...
Page 2: ...iii NT31 31C Programmable Terminal Operation Manual Produced March 1999...
Page 41: ...30 Before Operating Section 1 5...
Page 75: ...64 Using a Memory Unit NT31 NT31C without V1 Section 3 6...
Page 160: ...149...
Page 174: ...163...
Page 193: ...182...
Page 211: ...200...
Page 235: ...224 c Return to the screen on which screens are specified...
Page 262: ...251...
Page 360: ...349 It is not possible to control a gloval window by touch switch operation...
Page 468: ...457 254 255 0 2 7 1 4 5 3 3 0 0 0 5 9 8 0 3...
Page 476: ...465 Special Functions Section 7 16...
Page 495: ...484 OFF...
Page 610: ...599 Commands Responses Section 9 3...
Page 630: ...619 Examples of Actual Applications of Memory Link Section 10 2...