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Reference Manual
IP2048/RM, Rev AA
Appendix F: Configuring Using HART
February 2015
5. Select “Quit” to exit to the previous menu.
F.3.25 Lost echo action (P022)
This defines what happens to the process value (PV) and output current when a “lost echo”
condition exists (see page 128).
“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 “” on page 70). 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.
In addition, the two-wire loop current changes to indicate a low or high alarm as specified by the
model code (see “” on page 70). The current remains at that level until the correct target echo is
recovered.
“HOLD” action
The current output is held at the last good PV value.
Field Communicator
To view or change the lost echo action:
1. From the Home screen, select 2: Configure.
2. Select 2: Manual Setup.
3. Select 5: Engineering (MSP900GH)
or 6: Engineering (MSP400RH).
4. Select 2: Lost Echo Action P022.
5. If a change is required:
(a) Select a new action, and then press “ENTER” to save it.
(b) Press “SEND” to update the transmitter.
Note
When messages appear, take appropriate action if needed and press “OK”.
Fast Keys
2, 2, 5 [or 6], 2
Lost Echo Action P022
Hold
Minimum
Hold
Maximum
Hold
ENTER
ESC
(Field Communicator Screen)