The Discrete Output Screen - Emerson Rosemount 370XA System Reference Manual

370XA Gas Chromatograph
APRIL 2014
Invert Polarity
The Invert Polarity option reverses the way a voltage signal is
interpreted by the discrete input. By default, the Invert Polarity option
is set to Normally Open, which means that a low voltage signal is
interpreted by the discrete input as ON, and a high voltage signal is
interpreted by the discrete input as OFF. Setting Invert Polarity to
Normally Closed means that a low voltage signal is interpreted by the
discrete input as OFF, and a high voltage signal is interpreted by the
discrete input as ON.
This option can be changed with MON2020.
Current Value
Indicates the current state of the discrete input. Options are On and
Off.
4.3.2.5

The Discrete Output screen

Label
The name of the discrete output as set in MON2020.
Usage
A discrete output's usage mode determines which signals are routed
to it via the Limited Alarm and Discrete Alarm functions. A discrete
output can be assigned one of the following usage modes:
•
•
•
•
The usage mode can be changed with MON2020.
Switch
Indicates the discrete input's operational mode. Options are: Auto,
On, and Off. This field can be changed by the user.
DO
Common alarm
Stream
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System Reference Manual
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