Requirements for the system¶
Most important¶
Hint
In order to gain acceptance among stakeholders, it is absolutely necessary to guarantee the basic functions that are also available with a conventional installation.
This means that if the control level or process level devices fail, the following basic functions are retained:
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Switching the light on / off with conventional switches
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It must be possible to raise and lower the blinds by pressing buttons
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Sockets must be switched on moderately by default
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The heater must maintain the last specified temperature.
Some more¶
| type | description |
|---|---|
| robustnes | When the system is switched on (e.g. after a power failure) the system itself should start up and be active |
| robustnes | Services / applications on servers should be monitored automatically and restarted if necessary |
| robustnes | Backups of databases and other artifacts should be created automatically |
| robustnes | Basic functions like switching light on/off must work even if the control level or parts of the process level fail |
| interoperability | The different components of the system shall provide apis to exchange information and communicate with internal and external applications and systems. |
| interoperability | The system shall be open to different transport protocols and publishing / describing interfaces. |
| interoperability | For integrating iot devices the system shall provide a MQTT broker. That allows easy w-lan connecting of esp based devices |
| interoperability | The PLC shall communicate to sensors / actors hardwired, via modbus, analog voltage signals, ... |
| interoperability | The data formats, transport protocols and interfaces shall be derived from central managed masterdata |