KEYENCE IV Series - Manual (Page 49)

3-27 - IV Series User’s Manual (Field Network) -
Operating procedure of the cyclic communication
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When a trigger is unsuccessful
Trigger request
Result of A
Warning No.
A C B
A C
C
B
A
B
A
A
A
C
C
C
C
Result of C
Trigger response
Trigger failed
BUSY
Imaging status
Result update complete
Result available
Result No.
Warning
Overall judgment
Warning No.
(1) Execute a [Trigger request]. (0 → 1)
(2) If the trigger is valid, [Trigger response] will change from 0 to 1.
(3) [BUSY] will change from 0 to 1 when a trigger is input.
(4) [BUSY] will change from 1 to 0 when the judgment process ends.
The [Result update complete] BIT will be switched at this time; and [Overall judgment] will be updated.
(5) If you wish to output trigger errors, set the trigger error option to [Enabled].
If a trigger has been input while the trigger error option is set to [Enabled] and the unit is in “BUSY”
status, [Trigger failed] will change from 0 to 1 ignoring the trigger input. No judgment process will be
performed for trigger B.
(6) If the trigger input is unsuccessful, [Warning] will switch from “0” to “1” and [Warning No.] will be
updated to “65”. For details, refer to “Warning code list” (Page 3-23).
y [Result update complete] will switch to “1” if its value was “0” after the previous judgment update (or
from “0” to “1” if the previous value was “1”).
y [Result available] will switch from 0 to 1 at the timing when the first judgment process has been
confirmed; and the new value will be retained thereafter.
y [Result No.] will be counted up each time the status result is updated. The upper limit value is 32767. If
the maximum value is exceeded, it will go back to 0 and start counting up again.
y [Result No.] will also count the judgment process counts that were skipped due to the cyclic frequency
setting.
y [Busy] and [Imaging] may be skipped in some cyclic frequency settings. It is therefore necessary to take
the imaging condition into consideration when setting the cyclic frequency.
y [Number of trigger errors] will be counted up at the timing when the [Result updated] BIT is switched.
3
Cyclic communication