API stands for automate programmable industry. It is a device that controls a process (for example, a printing press for printing newspapers, a cement bag filling installation, a plastic injection press, etc.). This is done by the instructions of a program stored in the memory of the device.
How does the api control the process?
The plc controls the process by connecting actuators via the plc connection points called outputs a control voltage of 24 v eg .. This allows to start or stop a motor, up or down valves or lighting and extinguishing lamps.
How the api he receives information about the states of the process
Several memory areas to consider
- Micro-map load memory (all controllers are not equipped)
- Working memory
- System memory
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