Simulation Timeout; Application Test - Siemens SITRANS L 7ML5400 Operating Instructions Manual

7.14.4.4

Simulation timeout

Simulation will automatically be disabled and the LUT400 will return to normal measurement
and control ten minutes after changing (editing) any simulation parameter (except Level
Value (3.4.1.2.) (Page 263)). When the timeout occurs, parameters used to enable simulation
(Level Simulation Enable (3.4.1.1.) (Page 263), Discrete Input 1 (3.4.2.1.) (Page 263),
Discrete Input 2 (3.4.2.2.) (Page 264)), as well as Pump Activations (3.4.3.) (Page 264) will
switch to Disabled, and the message Simulation Enabled will no longer display on the LCD.
(Device status conditions will also reset in PDM, AMS, FDT, and FC375/475.)
7.14.5

Application test

You can test the application by varying the actual material level (the preferred test method),
or by simulating level changes.
If you are testing the application via simulation mode, decide if control devices, such as
pumps, are to be operational during simulation by setting the Pump Activations (3.4.3.)
(Page 264) parameter (see Pump relay behaviour during simulation (Page 156)).
Only enable Pump Activations (3.4.3.) (Page 264) when there is no possibility of the pumps
being damaged during simulation, or if the pumps have been locally disabled through some
other means.
While the level is being cycled, check the results of the discrete inputs either by closing the
circuit externally (preferred), or by setting DI simulation parameter to force the input ON or
OFF. Try all possible combinations to thoroughly test the setup. When simulating a changing
level, run a complete cycle (from Low Calibration Point to High Calibration Point and back
again) to verify that the relays operate as expected.
Monitor system performance carefully, under all anticipated operating conditions.
1. When the LUT400 performs exactly as required, programming is complete.
2. If alternate reading units, fail-safe action, or relay operation is desired, update the
parameters for the new functionality.
3. If you experience problems with system performance, see Diagnosing and Troubleshooting
(Page 271).
If you cannot observe all possible operating conditions by varying the material level, use
Simulation process (Page 157) to verify programming.
Retest the system each time you adjust any control parameters.
SITRANS LUT400
Operating Instructions, 04/2021, A5E33329501-AG
WARNING
General Operation
7.14 Simulation
159