Controlling a Traffic Signal Unit

• Controlling a Traffic Signal Unit
• Create POU
• What does TRAFFICSIGNAL do?
• What does WAIT do?
• What does SEQUENCE do?
• What does PLC_PRG do?
• TRAFFICSIGNAL simulation
• “TRAFFICSIGNAL” declaration
• “TRAFFICSIGNAL” body
• Connecting the standard.lib
• “WAIT” declaration
• “WAIT” body
• “SEQUENCE” first expansion level
• Create a SFC diagram
• Actions and transition conditions
• “SEQUENCE” second expansion level
• The result
• PLC_PRG
• TRAFFICSIGNAL simulation