KEYENCE BL-600 Series User Manual
Page 150
Chapter 8 PLC Link
140
8
■ Sequential processing
•
A number of “2” or “3” is written to the memory data flag area.
•
When the A+00 address is “2”, new data can be stored.
•
When data writing is completed, the flag area becomes “3”, and new data has
been stored in the A+05 to A+69 addresses.
•
After data processing is completed, set the flag area to “2”. Writing new data is
impossible until the flag area is set to “2”.
•
Data that has not been written into the specified area is stored in the transmis-
sion buffer of the BL-600 Series.
➮
See page 112.
If the amount of stored data
exceeds the capacity of the buffer, the entire contents of the buffer is cleared
and an “OVER” is stored in the memory data area (A+05 to A+09).
When an overflowed buffer error occurs, the BL-600 Series halts operation. It
will resume operation once the “OVER” has been stored.
Note: If the PLC link communication is not established or the memory data flag
area stores data other than a “0” or a “2” at the occurrence of an overflowed buffer
error, the BL-600 Series stops all operation because the “OVER” cannot be stored.
(Laser emission is disabled even if the trigger input turns on.)
In this case, check the settings and wiring of the BL-600 Series and the PLC, and
the PLC program.
The label orientation, decode count and other additional data are stored in these
areas.
If PMI is added, only A+02 and A+03 store the following data.
A+01 to A+04
Additional data area
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:
7
3
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:
8