LSI LASTEM M-Log – User’s manual
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Note: the duration of memory measured in days (according with the current configuration) is
displayed on PC after sending the configuration through 3DOM software.
5.5
Actuation logics
M-Log has got an actuation logics library. It’s useful to switch-on all type devices (alarms, solenoid
valves, motors) according the surveyed parameters in surrounding environment. The actuation
logics are based on the instantaneous value of the acquired and calculated measures. They can be
programmed up to 10 calculation algorithms, that use same or different logics. One or more
algorithms can be combined in two differed modes , in order to switch-on the selected actuator:
1)
All algorithms must be in alarm at the same time (AND logic);
2)
One algorithm can be in alarm at least (OR logic).
The actuator’s switch-on logic can operate according to
low power consumption
mode (the actuator
is usually deactivated, and starts in case of alarm), or according to
safety
mode (the actuator is
usually activated, and it shuts-down in case of alarm). Summarizing explanation in the table below.
Operating logic
State
Actuator
Low consumption mode
No alarm
Actuation output switched-off
Alarm
Actuation output switched-on
Safety mode
No alarm
Actuation output switched-on
Alarm
Actuation output switched-off
In case of one or several measures’ error (for example owing to sensor breaking, no-scale
acquisition, or disconnected cable) it doesn’t modify the present state of the actuator piloted by the
logic that uses the same measures.
The manual activation and deactivation of the actuators, performed by the user directly on the
instrument from
Diagnostic window type 4
(see §4.3.4), does not affect the actuation logics. The
actuation logic deactivates the actuator only if it has previously activated from the logic itself.
The actuation logic begins operation after the first activation of the actuator, even if this occurs
temporally after the deactivation.
The programming of the actuation logics happen by means of the
3DOM
program according to two
different phases:
1)
Selection of the logics and their calculation parameters (section
Logics
);
2)
Selection of the actuation outputs and their AND or OR modes correlation with the present
logics (section
Actuators
); note that the same logic can be combined with other different
logics several times, in order to switch over different actuators.
For M-Log with connector inputs (ELO009 series) may only be used the following actuation logics:
Cyclic timer or with data/hour start/stop;
Threshold value compare.