Backup Level Override (2.9.1); Discrete Input Logic (2.9.2) - Siemens SITRANS LUT400 Operating Instructions Manual

9.2.9.1

Backup Level Override (2.9.1)

Use this feature to override the material reading by a discrete input such as a contacting
point device. The material reading will be fixed at the programmed switch level until the
discrete input is released. The LUT400 makes decisions based on the override values.
Enable (2.9.1.1)
Enables/disables the Backup Level Override function.
Options
Level Override Value (2.9.1.2)
This value is substituted for the current reading when the selected discrete input is enabled
and ON.
Values
Value is defined in current Units (2.1.1.) (Page 168), and is valid only for level (and head
when Sensor Mode (2.1.2.) (Page 168) set to Flow). (Volume is calculated based on the
Backup level.)
Discrete Input Number (2.9.1.3)
Sets the discrete input to act as the source for a level reading override when enabled.
Options
9.2.9.2

Discrete Input Logic (2.9.2)

Use the following parameters to configure the discrete input itself.
Normal state is standard operation, with the SITRANS LUT400 sensing the material level
and controlling the pumps, and no faults or alarms present. The discrete input contacts are
either NORMALLY OPEN or NORMALLY CLOSED when the system state is normal.
Discrete Input Logic
Normally Open
Normally Closed
For example:
When discrete input logic is set to Normally Open and discrete input has no voltage applied
on the terminal block, the discrete input will be inactive (OFF).
208
*
Range: 0.000 to 60.000
Default: 0.000
*
Terminal Block
Voltage applied
No voltage applied
Voltage applied
No voltage applied
ENABLED
DISABLED
DISCRETE INPUT 1
DISCRETE INPUT 2
Discrete Input Scaled State
ON
OFF
OFF
ON
Operating Instructions, 07/2019, A5E33329501-AC
SITRANS LUT400