LSI LASTEM Alpha-Log - Actuators and Alarms; Logic Assigned to a Power Supply Output (Actuator)

Alpha-Log – User manual
LSI LASTEM SRL
INSTUM_03388
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4.1.10 Actuators and alarms
Each logic can be assigned to an actuator (Switched power supply output) or to an action (SMS, e-mail,
MQTT), or to both of them.
4.1.10.1 Logic assigned to a power supply output (actuator)
Logics assigned to power supply output (actuator) are based on the instantaneous value of the
measurements, both acquired and calculated. One or more logics can be combined, to switch on the chosen
actuator, in two different ways:
• AND: actuator is active when all the logics status assigned are on.
• OR: actuator is active when at least one logic status assigned is on.
The actuator assigned to a logic can work in low power mode (off when the logic status assigned is off, on
when the status turns to on), or in safety mode (on when the logic status assigned is off, off when the status
turns to on). The following table summarizes its meaning:
Operational mode of the output
Logic status
Power supply output
Low power
Not active
Off
Active
On
Safety
Not active
On
Active
Off
In case of any error condition of one or more measurements, due for example to sensor breakage, out of
scale acquisition or disconnected cable, it does not change the current state of the actuator driven by the
measurement assigned to this logic.
Fig. 18 – Example of logic assigned to a switched power supply output