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Configuration
July 2018
Figure 2-3. LOI Configuration Buttons
A. Configuration buttons
Table 2-2. LOI Button Operation
Button
Left
Right
LOI password
An LOI password can be entered and enabled to prevent review and modification of device configuration
via the LOI. This does not prevent configuration from HART or through the control system. The LOI
password is a four-digit code that is to be set by the user. If the password is lost or forgotten the master
password is "9307". The LOI password can be configured and enabled/disabled by HART communication
via a Field Communicator, AMS Device Manager, or the LOI.
LOI menu trees are available in
2.4.3
Setting the loop to manual
When sending or requesting data that would disrupt the loop or change the output of the transmitter,
set the process application loop to manual. The Field Communicator, AMS Device Manager or LOI will
prompt you to set the loop to manual when necessary. Acknowledging this prompt does not set the loop
to manual. The prompt is only a reminder; set the loop to manual as a separate operation.
2.4.4
Failure mode
As part of normal operation, each transmitter continuously monitors its own performance. This
automatic diagnostics routine is a timed series of checks repeated continuously. If diagnostics detect an
input sensor failure or a failure in the transmitter electronics, the transmitter drives its output to low or
high depending on the position of the failure mode switch. If the sensor temperature is outside the range
limits, the transmitter saturates its output to 3.9 mA for standard configuration on the low end (3.8 mA if
configured for NAMUR-compliant operation) and 20.5 mA on the high end (or NAMUR-compliant).
These values are also custom configurable by the factory or using the Field Communicator.The values to
which the transmitter drives its output in failure mode depend on whether it is configured to standard,
NAMUR-compliant, or custom operation. See Rosemount 644 Tempeture Transmitter
Sheet
8
for standard and NAMUR-compliant operation parameters.
A
No
Yes
Appendix C: Local Operator Interface
Reference Manual
00809-0200-4728, Rev SA
SCROLL
ENTER
(LOI).
Product Data
Configuration
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