Didactum | Logical Scheme Part 4

Under certain conditions, you can force a restart of the LAN-based remote control system using a rule defined in the logical schema. Please ensure that this function is used with care. This applies, for example, if you store the remote control system's measurement and log files on an email and/or FTP server. In our practical example, no reset and subsequent automatic reboot of the remote control system will occur if less than 30 minutes have elapsed since system startup.

Example: Creating one-off notifications, alerts, and actions

In the following example, IT administrators and technicians should be informed once via email and SMS as soon as the remote control system, restarted via reset/reboot function, is fully operational again:

Next, we configure the AC mains voltage sensor settings according to the task. In the event of a power failure, the lower threshold "Alarm level (low)" is set higher than 0 volts, as the IP-enabled sensor may still detect a residual voltage of several volts after a power failure/switch-off.

Now we will create logic to detect a power outage. Should the power fail, the IP-enabled AC mains voltage sensor will switch to "Alarm Level (Low)" mode. In this case, activate the "Power OFF" trigger and deactivate the "Power ON" trigger.

The "Blackout" trigger is activated if there is no power for an extended period, e.g., 30 minutes. We use the "Timeout" field to define the required time window. If the power supply is restored before the 30 minutes have elapsed, this logic scheme is not activated. This situation is represented by the following logic scheme:

Now we create a logic circuit for when the power supply is restored. The triggers "Power OFF" and "Blackout" are automatically deactivated when the voltage is within normal limits, i.e., when the intelligent AC mains voltage sensor is in any operating state outside the previously defined "Alarm level (low)":

Three triggers now reflect the current state of the monitored AC mains voltage. To inform the administrator and the facility manager, you can link logical schemes with individual notification and alarm functions. Warning lights or alarm sirens connected to the remote control system can also be automatically switched on and off. In the event of a blackout, email and SMS notifications will be sent every 15 minutes (use the "Repeat" field) until the power is restored. Don't forget to permanently save the rules you create to the memory of your measuring and monitoring device by clicking the floppy disk icon!

Example: Trigger functions in case of power failure / blackout

In our second practical example, the AC mains‑voltage sensor is used to immediately inform the administrator and the facility manager in case of a power failure or blackout. When the power supply is restored, an immediate e‑mail and SMS notification must again be sent to the responsible staff. If the power failure / blackout lasts longer than 30 minutes, the administrator and the facility manager must be notified once more by e‑mail and SMS. We now create the following trigger / activation functions in our Didactum remote monitoring system, which correspond to the three AC voltage states to be monitored:

Three triggers are now created in the German‑language web interface of the remote monitoring system, also known as triggers in modern terminology:

Trigger No. 1: Power ON – corresponds to the state when the power supply is switched on.
Trigger No. 2: Power OFF – corresponds to the state in which the power has (temporarily) failed.
Trigger No. 3: Blackout – corresponds to the emergency state in which there is no power for a maximum period of 30 minutes.

To create a trigger, click the “+” icon in the top‑right of the “System tree” in the remote monitoring system and select the “Trigger” function. We now create the corresponding triggers 1–3.

Example: Creating one-off notifications, alerts, and actions

Example: Trigger functions in case of power failure / blackout

Related Links

Powered by

Hint

This website uses cookies