KEYENCE SR-750 Series - Manual (Page 21)

21 E SR-750 UM
Code quality verification function settings
This section describes the setting method of the Code quality verification function
and the setting items.
Setting method for the Code quality verification
function
To use the Code quality verification function, you need to enable the verification
settings you wish to use.
(1) Setting using the AutoID Network Navigator.
Press the "Code quality verification" button on the "Operation" tab in the
Settings view, and then check the desired verification standard.
(2) Setting using the setup commands
Send commands that enable the verification functions you wish to use.
"8-3 Details of Configuration Commands - Reading operation setting (Page 77)"
Point When the Code quality verification function is enabled, the decode
time becomes longer than when it is disabled.
Perform calibration after enabling the Code quality verification
function or set the decode timeout period required for reading.
Use the tact measurement test mode to confirm there is no
problem with reading time for operation.
(
"3-4 Test Mode" (Page 12))
Append Code quality verification result data
To append the Code quality verification result data, the additional data setting and
data format setting are required.
„ Additional data setting
Select "Operation" - "Additional data" on the "Table" tab in the Settings view, and
then set verification results you wish to append as data to "Enable".
"5-4 Details of Settings View - [Table] tab (Page 43 or later)"
"3-11 Code quality verification function - Verification items description (Page 21
or later)"
„ Data format setting
Make the setting relating to the data format.
Set the following three items.
• Select expression of grades
: Set the grade indication of the verification
result to either Alphabet or Numeric.
(ISO/IEC15415 and ISO/IEC TR 29158
(AIM DPM-1-2006) only)
• Append detailed verification result : Set whether to append verification items of
each standard to the total grade.
(ISO/IEC15415, ISO/IEC TR 29158 (AIM
DPM-1-2006) and SAE AS9132 only)
• Append values : Set whether to append evaluation values of
each verification item used for verification
result evaluation.
(ISO/IEC15415, ISO/IEC TR 29158 (AIM
DPM-1-2006) and SAE AS9132 only)
"7-2 Data Communication Format (Page 63)"
Code quality verification function Evaluation standard
Evaluation by the Code quality verification function is made for the total evaluation
grade.
Evaluation standards are as follows.
„ ISO/IEC15415, ISO/IEC TR 29158 (AIM DPM-1-2006)
High: Verification result >= Threshold value
Low: Verification result < Threshold value
„ SAE AS9132
High: Verification result = Pass
Low: Verification result = Fail
Important SEMI T10-0701 does not offer total evaluation grade and cannot
make evaluations.
This means that functions that can be used after evaluation
cannot be used with SEMI T10-0701.
Functions that can use evaluation results of the Code
quality verification function
„ STABLE terminal output, UNSTABLE terminal output
STABLE terminal output......... This is output when the total evaluation grade is the
threshold value or more.
UNSTABLE terminal output ... This is output when the total evaluation grade is less
than the threshold value.
( "3-6 Multi-I/O Function (Page 14)")
„ Saving images of unstable reading
When the total evaluation grade is less than the threshold value, scanned images
are saved according to the setting (If the FTP transmission is set, images are sent
to the connection destination.).
(
"3-7 Image Saving Function (Page 16)")
„ Silent mode
When the total evaluation grade is more or less than the threshold value, data
communication can be restrained using the silent mode.
(
"3-8 Silent Mode (Page 18)")
Point When multiple verifications are in process, these functions
operate in priority to the result which is less than the threshold
value.
Note when using the Code quality verification function
Code quality verification results may change according to the setting of the
parameter bank for scanning. If the color or contrast of the 2D code and
background change, consider preparing the parameter bank setting used as
standard and performing the Code quality verification using the setting.
Verification items description
ISO/IEC 15415
Decode success/failure DEC (Decode)
Description Evaluates whether decoding is possible or not.
―
Calculation
formula
―
Criterion ―
Symbol contrast SC (Symbol Contrast)
Description
Evaluates the difference between the
maximum brightness value (Rmax) and
minimum brightness value (Rmin) in the code
area.
Calculation
formula
SC = (Rmax-Rmin)/255
Rmax : Maximum brightness value
Rmin : Minimum brightness value
Criterion
A : more than 0.70
B : 0.55 to 0.70
C : 0.40 to 0.55
D : 0.20 to 0.40
F : less than 0.20