Rosemount 3107, Справочное руководство

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60
Reference Manual
00809-0200-4840, Rev BA
Section 4: Configuration
December 2014
Section 4: Configuration
Field Communicator or AMS
To view or change the lost echo delay:
1. From the Home screen, select 2: Configure .
2. Select 2: Manual Setup , and then select 5:
Engineering .
3. Select 1: Lost Echo Delay P021 .
4. Input a new value, and then select “ ENTER ” to save it.
5. Press “ SEND ” to update the transmitter.
Note

When messages appear, take appropriate action if needed and press “ OK ”.
Rosemount 3490 Series Control Unit
To view or change the lost echo delay:
1. From the Main Menu screen, select SETUP .
2. Select the transmitter (e.g. “ Tx1: 3107 ”).
3. Select ENGINEERING ., and then select LE Delay .
4. Follow the on-screen instructions to edit and save the new setting.
(Press the
Enter ( ) key if prompted to change the mode to “off-line”).
5. Select “ Quit ” to exit to the previous menu.
4.3.22 Lost echo action (P022)
This defines what happens to the process value (PV) and output current when a “lost echo”
condition exists (see
page 59 ).
“MINIMUM” action
The PV is forced to zero while a “lost echo” condition exists.
In addition, the two-wire loop current changes to indicate a low or high alarm as specified by the
model code (see “Special Alarm Options” on page 118 ). The current remains at that level until
the correct target echo is recovered.
“MAXIMUM” action
The PV is forced to the maximum while a “lost echo” condition exists. The maximum PV is the
value that occurs when an echo is received from the transmitter face.
Fast Keys
2, 2, 5, 2
Lost Echo Delay P021
900 s
900
ESC DEL ENTER HELP
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(Field Communicator Screen)
LE Delay P021
900sec
Esc=Quit =Edit
(Rosemount 3491 Screen)