Trigger - Siemens SIMATIC MV500 Operating Manual

Application
5.1 Program
5.1.3.3

Trigger

There are three different ways of controlling image acquisitions and processing procedures:
● Individual trigger
● Auto-trigger
● Scan
Individual trigger
With the setting "Individual trigger", one image is acquired per trigger followed by one read. If
several objects need to be acquired in a very short time (bulk), acquired images can be
buffered before they are processed.
Table 5- 12 Options if "Individual trigger" is selected
Parameter Possible values
Cycle time limit Minimum image acqui-
sition interval
(+ minimum decoding
time + minimum verifi-
cation time)
19 ... 100000 ms
Image buffer
SIMATIC MV500 S/
•
H: 1 ... 50
SIMATIC MV500 U/
•
X: 1 ... 5
Depending on the connected device variant
1)
Auto-trigger
Table 5- 13 Options if "Auto-trigger" is selected
Parameter Possible values
Acquisition interval Larger of the two
values "minimum
image acquisition
interval" and "mini-
mum decoding time"
15 ... 100000 ms
Initial trigger
•
•
32
Default
2000 /
5000 ms
1
Default
400 ms
Off
On
Off
Description
Here, you enter the high limit for the processing time. The
time is measured from the triggering of a read to the point at
1)
which the corresponding read result is available.
In "Program sequence" mode, the cycle time limit is applied
separately for each program.
Determines the number of acquired images to be buffered.
The processing of the images can then take place at a later
time than image acquisition.
The image buffer can also be used in "Program sequence"
mode. The image buffer is distributed evenly over the vari-
ous programs of the program sequence.
Description
Here, you enter the interval at which independent acquisi-
tion of the images is repeated. This is also the time you
allow the reader for reading (decoding time).
If the selected interval is too short, e.g. with poor marking
quality, no reading takes place. In this case, increase the
time and test the reading again.
When this option is enabled, the reader waits for an external
trigger that starts the Auto-trigger. This can be useful to help
reduce energy costs.
The auto-trigger is stopped as soon as a code is recog-
nized.
Operating Manual, 05/2019, C79000-G8976-C495-02
SIMATIC MV500