Advantech WISE-4000 Series, User Manual

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53 WISE-4000 User Manual
Chapter 4
S
ystem
Configuration
For the values which are going to be configured for scaling the output data. For users
using RESTful Web API Mapping Unit, can be configured here for further use.

High/Low Alarm
For an AI module with digital or relay output functions featuring a built-in alarm func-
tion. When the analog input value is higher than the high alarm value, or lower than
the low alarm value, an alarm condition occurs. Then the alarm status will be acti-
vated to logic high. The alarm status ia shown in the status page of AI as alarm status
LED display, when the alarm condition occurs, the Alarm status LED display will be
lit.
The specified digital output channel will generate a logic high value if you build the
mapping relationship between alarms and DO channel in the DO mapping area. You
can map the DO channel referring to AI Alarm section of DO configuration. The High/
Low Alarm status LED in AI status page can be cleared by clicking “Clear”.
This page is for enabling and configuring the alarm. There are two alarm modes:
1. Latch : Once the alarm occurs, the alarm status will be activated to logic high
level and will keep the value until the alarm is manually cleared. Before the
value is cleared, the Alarm status LED will be continuously lit. For an AI module
with digital or relay output functions, the specific output channel (chosen in the
DO AI Alarm configuration page) will continuously generate logic high value.
You can clear the alarm by clicking the “Clear” button in the AI status page.
2. Momentary : The alarm status will dynamically change depending on the alarm
condition. If the alarm occurs, the alarm status will be logic high. If the alarm
condition disappears, the alarm status will be logic low. So not only will the
Alarm status LED be lit, in the web page the specific digital output channel value
will change depending on the alarm condition.
After you choose the alarm mode for high alarm or low alarm, you can define the
high alarm value or low alarm value by entering the value in Alarm limit text box.