KEYENCE BL-700 Series - Manual (Page 126)

Chapter 6 PLC Link
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6
● Operating procedure
1. Set the +05 address to “0”.
2. To trigger the BL-700 to start reading (to turn the trigger ON), set the +04
address to “1”.
3. When the BL-700 recognizes the change in the +04 address, it returns a “1” to
the +05 address. The BL-700 then starts reading the data.
4. When a “1” is returned to the +05 address, it indicates that the BL-700 suc-
ceeded in the trigger ON function. If a “1” is not returned, the BL-700 has not
recognized the +04 address yet. Do not immediately reset the +04 address to
“0”.
After confirming that a “1” has been returned to the +05 address, reset the
address to “0”.
5. After reading the bar code data, the BL-700 writes new data in A+05 to A+69.
6. To turn the trigger OFF, reset the +04 address to “0”.
7. When the BL-700 recognizes the change in the +04 address, it returns a “1” to
the +05 address. The trigger then turns OFF.
8. When a “1” is returned to the +05 address, it indicates that the BL-700 has
successfully turned the trigger OFF. If a “1” is not returned, the BL-700 has not
recognized the +04 address yet. Do not immediately set the +04 address to “1”.
After confirming that the +05 address has been set to “1”, reset the address to
“0”.
9. If a reading error occurs, a reading error code is written in A+05 to A+69.
Note: The +05 address monitors whether or not the BL-700 successfully recog-
nized the +04 address. When quickly turning the trigger ON/OFF at the +04 ad-
dress, the BL-700 may overlook the change in the +04 address and fail to turn the
trigger ON/OFF. If this occurs, change the program so that the +05 address can
confirm that the BL-700 recognized the +04 address.
If your system does not have the problem described above, monitoring by the +05
address is not required.
■ One-shot signal trigger
The +04 address “Reading trigger area” triggers the BL-700 to start reading (turn
ON the laser).
The +05 address “One-shot signal trigger time setup area” sets the scan time in
one-shot signal mode (
➮ see P.31). When “0” is set for this address, the value set
by the BL-700 setup software is used as the scan time.
* When the BL-700 recognizes “1”, “0” is set to the +04 address.
Address Description Data
+04 Reading trigger area and response area 1: Trigger ON
0: Trigger OFF
+05 Reserved Reserved
+06 One-shot signal trigger time setup area 0: Use the value set by the
BL-700 setup software.
1 to 255 (binary) : 100 ms to
25.5 s