Advantech WISE-750, Руководство пользователя

Страница: 29 / 44

23 WISE-750 User Manual
C
ha
pte
r 4
D
ev
ice
C
on
fig
ura
tio
n
4.6 Trigger Settings
4.6.1 Trigger Source
Select the trigger source via the options in the combo box. Options are: None, Digital
Input, and Analog Input from the respective channels to be chosen from. Whenever
the trigger is set to None, WISE-750 will run right after the setting is downloaded to
the machine. Otherwise, the cycles would start when receiving the trigger signal/
action.
4.6.2 Trigger Types
Digital Trigger
The digital trigger of WISE-750 uses the level trigger. There are two options "Active
High" and "Active Low" to trigger the iteration cycle. That means, a trigger is gener -
ated whenever the level of trigger source is HIGH (Active High) or LOW (Active Low)
based on the settings. On the other hand, in the context of analog trigger, the options
would be changed to beyond (>) or under (<) trigger level. In the meantime, the filter
can also be set (see the section Filter).
Figure 4.10 describes the action in the context where the type is set to Digital Trigger
and Active High. In the beginning of the cycle, the trigger signal is high. In this situa -
tion, a trigger would be generated. The triggers are also effective when the signal
turns to high, just like the consecutive two pulses. Whenever the process idles and
meets the active zone, the process cycle will be triggered. This mechanism could
also be applied when setting type to Active Low.
Figure 4.10 Digital Trigger
Analog Trigger
When the trigger type is set to ">" (greater than) level, a trigger will be generated
when the incoming signal condition is fulfilled.
See Figure 4.11.