Pump Relay Behaviour During Simulation - Siemens SITRANS LUT400 Operating Instructions Manual

General Operation
7.14 Simulation
The following functions will not respond to the simulated value when in simulation mode:
● Fault Conditions - The LUT400 will never enter the Fail-safe state when in simulation
mode. For further details see Fail-safe and Simulation (Page 155).
● Backup Level Override - If a Backup Level Override switch is configured and it lies within
the simulated Level range, it will not be simulated. To simulate a Backup Level Override,
simulate the discrete input. See Simulating Discrete Inputs (Page 156).
● Totalizing of OCM Flow - Totalizing of flow (OCM applications) does not occur during
simulation. The OCM Daily Totalizer (2.16.1.) (Page 238) and Running Totalizer (2.16.2.)
(Page 238) will not increase in value during simulation.
● Totalizing of Pumped Volume - Totalizing of pumped volume does not occur during
simulation if Pump Activations (3.4.3.) (Page 259) is set to Disabled. If pumps are set to
run during simulation, the material pumped will be totalized (Running Totalizer (2.7.3.1.)
(Page 194)).
● External Sampler - The external sampler, if configured, will click at its timeout interval
when in simulation mode (see Interval (2.11.4.3.) (Page 217)).
7.14.1

Pump relay behaviour during simulation

The Pump Activations (3.4.3.) (Page 259) parameter allows you to choose how the physical
relays that are assigned to pumps will behave when in simulation mode.
This parameter has two possible values:
Disabled: Pump relays are not activated in simulation (default value).
Enabled: Pump relays are activated in simulation.
If Pump Activations (3.4.3.) (Page 259) is Disabled, only the LCD indicators are affected (the
corresponding relay icons will turn ON, but the relays will not energize). If Pump Activations
(3.4.3.) (Page 259) is Enabled, the relay icons will turn ON, and the relays will energize.
Select Enabled only when there is no possibility of the pumps being damaged during
simulation, or if the pumps have been locally disabled through some other means.
Note
• If the pump relays are configured to physically activate in simulation mode, then any time
activated will be recorded in the pump Run Time parameter (see Pump Records (3.2.7.)
(Page 243)).
• If a pump start delay has been programmed for the device (Delay Between Starts
(2.7.2.4.1.) (Page 194)), it will be respected in Simulation mode.
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WARNING
Operating Instructions, 07/2019, A5E33329501-AC
SITRANS LUT400