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V500-R2 series
User’s Manual
Sect
ion
6
Exp
la
nat
io
n of Te
rms
Section 6
Appendix
PCS
PCS is an abbreviation of "Print Contrast Signal" and is a value of reflectance ratio of
space (ground color) and a bar indicated in a calculation formula.
PCS can be calculated by the following formula.
The PCS of this bar code reader is 0.45 or more. (However, ground color reflection
ratio is 85 %.)
When expressing PCS, the above formula only may be a relative value. Ground color
(space) reflection ratio condition is required to specify to recognize as an absolute value.
MRD
MRD is an abbreviation of "Minimum Reflectance Difference", indicating contrast of
bars and spaces. MRD can be calculated by the following formula.
The MRD of this bar code reader is 32 % or more. (However, ground color reflection
ratio is 85 % or more.)
RS/CS control
Control system to communicate data between the bar code reader and the upper
equipment. Data is transmitted while verifying to hardware through RS/CS line
"whether to transmit or not".
GS1-128 (Reading specification)
The head of GS1-128 data always starts with "Start code" + "FNC1".
When "Only GS1-128 reading is allowed (G6)" is set, codes other than this combination
may be read error.
When "All reading allowed including EAN (G5)" is set, CODE128 other than this
combination can be read.
Start pattern of GS1-128 is converted to "C1" (5Dh43h31h in ASCII code) and output.
"FNC1" (separator) indicating data separation is converted to "GS" and output.
• RD: Reflection ratio of a bar
• RL: Reflection ratio of ground color (space)
PCS =
RL
RL - RD
• RD: Reflection ratio of a bar
• RL: Reflection ratio of ground color (space)
MRD = RL - RD
Start
Code
FNC1
Data 1
Fixed
length
Data 2
Variable
length
FNC1
Data 3
Variable
length
Check
digit
Stop code
EAN start pattern
Separator
Содержание V500-R2 Series
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Страница 18: ...16 V500 R2 series User s Manual Introduction Contents Introduction MEMO...
Страница 36: ...34 Section 2 Installation V500 R2 series User s Manual Section 2 Wiring and Installation MEMO...
Страница 52: ...50 Section 3 Test Reading Function V500 R2 series User s Manual Section 3 Function Explanation MEMO...
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