Discrete Input Logic - Siemens SITRANS LUT400 Series Operating Instructions Manual

Discrete Input Logic

Discrete input logic affects the reaction of the discrete input. Normal state is standard
operation, with the SITRANS LUT400 sensing the material level and controlling the
pumps.
The contacts of the signalling device connected to the discrete inputs may be normally-
open or normally closed.
Example:
Normal state for a backup high level switch is open, and the contacts on the discrete
input are wired as normally open.
This logic can also be reversed (NORMALLY OPEN to NORMALLY CLOSED or vice versa).
Use the Discrete Input logic parameters to set the state of each discrete input.
Function
2.9. Discrete Inputs
Read the current state of discrete input 1 in
current state of discrete input 2 in
Discrete inputs
See
override a level using a discrete input, see
A5E33329501
2.9.2. Discrete Input Logic
2.9.2.4. Discrete Input 2 Scaled State
on page 28 for complete details on wiring the discrete inputs. To
SITRANS LUT400 (HART) – OPERATING INSTRUCTIONS
Parameter
2.9.2. 1 . Discrete Input 1 Logic
2.9.2.3. Discrete Input 2 Logic
2.9.2.2. Discrete Input 1 Scaled State
2.9.1. Backup Level Override
and the
.
on page 171.
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