Levels of SCADA Programming

SCADA programming occurs at different levels within the system:

1. Level 0 (Field Devices):

   • Field devices include sensors (e.g., flow and temperature sensors) and final control elements (e.g., control valves).
   • These devices directly interact with the physical process.

2. Level 1 (I/O Modules):

   • Industrial input/output (I/O) modules and their associated electronic processors reside at this level.
   • They handle data exchange between field devices and higher levels.

3. Level 2 (Supervisory Computers):

   • Supervisory computers collect information from processor nodes.
   • Operators use HMIs to monitor processes and issue commands.

4. Level 3 (Production Control):

   • Monitors production targets and overall performance.
   • Not directly involved in process control.

5. Level 4 (Production Scheduling):

   • Deals with production planning and scheduling.