KEYENCE BL-180 - Manual (Page 22)

2.2 Read modes
14
Operation of multi-label read mode 3
This mode allows the unit to continuously read each one of 4 bar code types
“Code 1”, “Code 2”, “Code 3”, and “Code 4” as specified in the “code setup” of the
setup software (see page 32). If 3 types are specified in the “code setup”, the unit
reads 3 bar codes (each of 3 types). If 2 types are specified, the unit reads 2 bar
codes.
The following time chart is given.
The above example chart is with all four codes specified in the “code setup” of the
setup software.
• The bar code reading sequence is not fixed.
• The unit communicates the readout data in the order of Code 1 to Code 4.
After the trigger input turns off, the unit sends all the data at one time.
• For OK/NG output, “OK” turns on if the unit reads all the specified Codes 1 to 4
and “NG” turns on if the unit fails to read at least one bar code. (Comparison to
the preset data is not performed.)
Reading data format
• Each data packet is separated by a comma (, : 2CH) (intermediate delimiter).
• If an read error occurs on any one of Codes 1 to 4, or the corresponding bar
code does not exist, “ERROR” (see page 49 for the reading error codes),
instead of the read data is sent.
• See page 48 for “header string” and “delimeter”.
Example Suppose that the following codes are specified:
Code 1 --- CODE39, 10 digits
Code 2 --- EAN/UPC, 13 digits
Code 3 --- None
Code 4 --- CODE39, 8 digits
When the unit successfully reads all 3 types of codes:
When the unit fails to read Code 1 (CODE39, 10 digits)
When the unit fails to read Code 1 (CODE39, 10 digits) and Code 4 (CODE39, 8
digits)
When the same type of data having the same digits is specified to all Codes 1 to
4, the unit sends the data in the reading order.
OK
Trigger input
Bar Code
LED beams
Communication time
OK/NG output
Code 1 Code 2 Code 3 Code 4
Code 1 Code 2 Code 3 Code 4
NG
Header
Data read
from Code
1
,
Data read
from Code
2
,
Data read
from Code
3
,
Data read
from Code
4
, Delimeter
Header ABCDE12345 , 4901234567894 , KEYENCE Delimeter
Header ERROR , 4901234567894 , KEYENCE Delimeter
Header ERROR , 4901234567894 , ERROR Delimeter