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Reference Manual
00809-0100-4696, Rev AA
September 2004
Rosemount 848L
2-6
Security
After configuring the transmitter, the data can be protected from unwarranted
changes. Each 848L is equipped with a security switch that can be positioned
“ON” to prevent the accidental or deliberate change of configuration data.
This switch is located on the front side of the electronics module and
is labeled SECURITY.
See Figure 2-5 on page 2-5 for switch location on the transmitter label. Refer
to Section 3: Configuration, “SOFT WRITE LOCK and HARD WRITE LOCK”
on page 3-5.
Simulate Enable
The switch labeled SIMULATE ENABLE is used in conjunction with the with
the Discrete Input (DI) and Discrete Output (DO) function blocks. This switch
is used to simulate input status. As a lock-out feature, the switch must
transition from “OFF” to “ON” after power is applied to the transmitter. This
feature prevents the transmitter from being left in simulator mode.
NOT USED
The switch labeled NOT USED is only used for product engineering and
development purposes and should always remain in the “OFF” position. If the
switch is turned to the “ON” position and power is applied, the 848L will not be
present on the fieldbus segment.