In normal operation information is periodically passed between the Node and Host. This informa-
tion mainly consists of current Input values and IP Alarm status. The amount of data transferred
during this update is about 700 bytes. You can choose how often information is updated from the
Node by selecting either periodic updates (Auto Send) or by selecting Update on a Percent Change
basis. This can be used to control network traffic. When you enable the
Auto Send Status Updates
box, the Node will send an update (700 bytes) to the Host based on the
Interval
you program. When
you choose the
Send Update on Change
option, the Node will only send an update when a sensor
value increases or decreases by
x%
as programmed. You can even choose to enable both options for
more flexibility.
Note that if an alarm is detected, the Node will transmit this information to the Host
immediately
.
The Node Properties screen is shown below:
Figure 14: Node Properties Setup Tab
Sample Application:
1) Suppose you are concerned about network traffic generated by Node-to-Host communication but
want to view input values that are no more than 20 minutes old.
=>You can enable th
e Auto Send
option and enter an interval of 1200 seconds (20 minutes). This
will limit Node-to-Host data transfers to no more than 700 bytes every 20 minutes.
2) Suppose that in addition, if the temperature changes by more than 3 degrees Fahrenheit (about
4% at room temperature) you want to see this update immediately.
=> You can enable the
Send Update on Change
option and enter a value of 4%. This will instruct
the Node to send an update if the temperature changes by +/- 4% since the last update.
Changing Node Network Settings
You can remotely change the Node network settings using the ConsoleView software if the
Allow
Remote Configuration
option is set in the Node Local Configuration options. However, before
doing so consider the following:
If you change the parent Host IP address in the Node, then the Node will no longer be in contact
with the Host until the Host’s IP address also changes.
To change the network settings, right-click on the Node Unit Name and select
Node Properties
.
Click on the
Network
tab. Click on the
Modify
button to bring up the Network Setup screen.
IMS-4000 Manual
48
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