Siemens SITRANS LUT400, Руководство по эксплуатации

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A5E33329501 SITRANS LUT400 (HART) – OPERATING INSTRUCTIONS Page 123
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Simulating a changing level
1. Set the desired starting level value in
3.4.1.2. Level Value
.
2. Set
3.4.1.3. Ramp
to Enabled.
3. Set
3.4.1.4. Ramp Rate
to the desired speed, e.g. Medium.
4. Enable
3.4.3. Pump Activations
if desired (see
Pump relay behaviour during
simulation
on page 121).
5. Set
3.4.1.1. Level Simulation Enable
to Enabled to start level simulation.
The simulated level will initially begin ramping up from
Level Value
(increasing level).
When the level rises to 100% or falls to 0%, it reverses direction at the same rate.
Set
3.4.1.1. Level Simulation Enable
to Disabled when you wish to stop level simulation.
Simulating Discrete Inputs
1. Enable
3.4.3. Pump Activations
if desired (see
Pump relay behaviour during
simulation
on page 121).
2. Set the discrete input to be simulated (
3.4.2.1. Discrete Input 1
,
3.4.2.2. Discrete Input
2
or both) to one of the following:
• ON: the discrete input is simulated to be on
• OFF: the discrete input is simulated to be off.
Set parameter(s) for DI to be simulated (
3.4.2.1. Discrete Input 1
and/or
3.4.2.2. Discrete
Input 2
) to Disabled if you do not wish to simulate a discrete input, or to stop DI simulation
that is currently running.
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
). When the timeout occurs, parameters used to enable simulation
(
Level Simulation Enable
,
Discrete Input 1
,
Discrete Input 2
), as well as
Pump
Activations
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.)
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
parameter (see
Pump relay behaviour during simulation
on page 121).
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
WARNING:
Only enable
Pump Activations
when there is no possibility of the
pumps being damaged during simulation, or if the pumps have been locally
disabled through some other means.