Cloud-based SCADA (IIoT) in SCADA systems - Step-by-Step Execution

Process Flow - Cloud-based SCADA (IIoT)

Sensors collect data

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Data sent to Edge Gateway

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Edge Gateway preprocesses data

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Data transmitted securely to Cloud

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Cloud SCADA system stores and analyzes data

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Operators access dashboard remotely

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Control commands sent back to devices

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Devices adjust operations accordingly

Data flows from sensors through gateways to the cloud, where it is stored and analyzed, then operators remotely monitor and control devices.

Execution Sample

SCADA systems

1. Sensor reads temperature
2. Gateway receives data
3. Gateway sends data to cloud
4. Cloud stores and analyzes
5. Operator views dashboard
6. Operator sends control command

This sequence shows how sensor data moves from collection to cloud storage and operator control in a cloud-based SCADA system.

Process Table

Step	Action	Data State	System Component	Result
1	Sensor reads temperature	Temperature=75°F	Sensor	Data ready
2	Gateway receives data	Temperature=75°F	Edge Gateway	Data buffered
3	Gateway sends data to cloud	Temperature=75°F	Network	Data transmitted securely
4	Cloud stores and analyzes	Temperature=75°F	Cloud SCADA	Data stored and alert checked
5	Operator views dashboard	Temperature=75°F	Operator Interface	Current status displayed
6	Operator sends control command	Command=Increase cooling	Operator Interface	Command sent to cloud
7	Cloud forwards command	Command=Increase cooling	Cloud SCADA	Command dispatched to gateway
8	Gateway sends command to device	Command=Increase cooling	Edge Gateway	Device receives command
9	Device adjusts operation	Cooling increased	Device	Operation updated
10	System monitors new state	Temperature=72°F	Sensor	Data updated
11	Loop continues	Updated data	System	Continuous monitoring
12	Exit	N/A	System	Process runs continuously

💡 Cloud-based SCADA runs continuously for real-time monitoring and control

Status Tracker

Variable	Start	After Step 1	After Step 4	After Step 9	Final
Temperature	N/A	75°F	75°F	72°F	72°F
Command	None	None	None	Increase cooling	Increase cooling
Data State	No data	Data ready	Stored	Updated	Updated

Key Moments - 3 Insights

Why does the temperature value stay the same between steps 1 and 4?

Because the sensor reads the temperature once at step 1 and the same data is transmitted and stored without change until the device adjusts operation at step 9.

How does the operator's command reach the device?

The command flows from the operator interface to the cloud SCADA, then to the edge gateway, and finally to the device, as shown in steps 6 to 8.

Why does the system continue running after step 11?

Because cloud-based SCADA systems operate continuously for real-time monitoring and control, looping through data collection and command cycles.

Visual Quiz - 3 Questions

Look at the execution table, what is the temperature value after step 9?

A 70°F

B 72°F

C 75°F

D None

💡 Hint

Check the 'Temperature' variable in variable_tracker after step 9

At which step does the operator send a control command?

A Step 6

B Step 4

C Step 8

D Step 10

💡 Hint

Look at the 'Action' column in execution_table for operator actions

If the gateway fails to send data to the cloud at step 3, what happens next?

A Data is lost and system stops

B Operator receives alert immediately

C Gateway retries sending data

D Device adjusts operation without command

💡 Hint

Consider typical edge gateway behavior in cloud-based SCADA systems for reliable data transmission

Concept Snapshot

Cloud-based SCADA (IIoT) collects sensor data via gateways,
sends it securely to the cloud for storage and analysis,
operators monitor and control devices remotely,
and the system runs continuously for real-time updates.

Full Transcript

In a cloud-based SCADA system for Industrial IoT, sensors first collect data such as temperature. This data is sent to an edge gateway that preprocesses and buffers it. The gateway securely transmits the data to the cloud SCADA system, where it is stored and analyzed. Operators access a remote dashboard to view current system status and send control commands. These commands flow back through the cloud and gateway to the devices, which adjust their operations accordingly. The system continuously monitors updated data, enabling real-time control and monitoring. This flow ensures efficient, remote management of industrial processes.