3.9
Configure update rate
The
Update Rate
is the frequency at which a set of data is transmitted over
the wireless network.
The user can select the
Update Rate
from a range of one second to 60
minutes.
By default, the update rate is set to 1 minute. This rate can be changed at
any time through either the AMS Device Manager, the Wireless Gateway
web-based user interface, or the AMS Trex Device Communicator.
3.9.1
Burst messages
The Rosemount 4390 Wireless Transmitter has 3 configurable burst
messages. Each burst message has its own independent update rate and can
contain up to 8 device variables, depending on the HART command
configured by the user during the Update rate configuration process.
Depending on the number of variables to transmit, all 3 burst messages
might not be needed. Emerson recommends that you disable unused
messages.
Note
The Burst messages have a default update rate set to 60 seconds (1 minute).
It is recommended to change the update rate after the first successful
connection to a wireless network to save battery power. The update rates
should be identical to the acquisition rate. Set the update rates to 60
minutes, if the acquisition rate is above 60 minutes.
3.10 Configure alerts
The Rosemount 4390 Wireless Transmitter has factory defined alerts and
supports user configurable alerts. Device specific status bytes are used to
identify the device specific alerts.
The alerts are classified as either Maintenance, Advisory, or Failure alerts and
are listed in the tables below:
1. Maintenance alerts:
2. Advisory alerts:
3. Failure alerts:
Table 3-4: Maintenance alerts
Alert message
Device status
(Byte :: Bit)
Description
Probe life reached 0%
0 :: 1
The probe has reached end of life
and needs to be replaced.
Quick Start Guide
April 2021
16
Emerson.com/Rosemount
