Simulation - Siemens SITRANS L 7ML5400 Operating Instructions Manual

When using the Web Browser tool to upload logs, individual log files are stored on the PC in
the universal CSV (comma-separated-value) format for ease when importing to other
programs, such as spreadsheets or other data-analysis packages. For a list of field names, see
Data Logging (Page 307).
To clear entries when memory is full, browse to Delete Logs (2.10.5.) (Page 216) and select
Yes to permanently delete all logs.
7.14

Simulation

The SITRANS LUT400 supports simulation from the LUI. Level and discrete inputs can be
simulated, separately or concurrently.
Level Simulation
In level simulation, the LCD reacts to the simulated level changes, and activates relays based
on the setpoints programmed. The material level can be set to continuously sweep through
the measurement range, from Low Calibration Point to High Calibration Point and back again
(using Ramp (3.4.1.3.) (Page 263), Ramp Rate (3.4.1.4.) (Page 263)), or the material level
can be held at a specific value (using Level Value (3.4.1.2.) (Page 263)).
Discrete Input Simulation
When discrete inputs are simulated, the DI icon on the LCD will show the simulated states of
the discrete inputs. Any programming that uses the discrete inputs, such as the backup level
override, will use the simulated values.
In simulation mode, some of the LUT400's configured functionality will respond to the
simulated value, including:
• Readings that are based on Level - The LUT400 supports simulation of Level values only.
Other simulated values cannot be entered, however, these values will be calculated
correctly when Level is simulated. Space, Distance, Volume, Flow, and Head will be
calculated [see Sensor Mode (2.1.2.) (Page 173)].
• The milliamp output - The current loop output will also track the corresponding reading
(Level, Space, Distance, Volume, Flow, or Head depending on which of these it is
configured to track). [See Current Output (2.5.) (Page 180)]
• Alarms - Any alarms that have been configured, including any relays configured for
alarms, will activate based on the simulated value. [See Alarms (2.8.) (Page 200).]
• Relays configured for pumps - If the device is configured for a pump application then the
corresponding relay indicators on the LCD will also show when the pumps would activate.
By default the relay contacts themselves will not activate in simulation mode, but this
behaviour can be changed if desired (see Pump relay behaviour during simulation
(Page 156)).
• Logging - Log files will reflect the simulated values. This includes logging simulated high-
flow/low-flow conditions, and any alarms.
SITRANS LUT400
Operating Instructions, 04/2021, A5E33329501-AG
General Operation
7.14 Simulation
155