Copyright Goodheart-Willcox Co., Inc. Chapter 6 PLC Programming 123 L AB ACTIVIT Y 6B Control Problems This lab activity can be found in the Lab Manual as Lab Activity 6-11. Objective In this activity, you will create relay logic diagrams from problem descriptions. Then, you will create PLC ladder logic diagrams and verify their operation. Equipment • Allen-Bradley SLC 500 series PLC trainer • Single-pole, single-throw (SPST) switches (2) • Normally open pushbuttons (2) • Red, green, and white pilot lights • Split-phase AC induction motors (2) (fractional horsepower) Procedure Activity 1 In this activity, you will create a PLC ladder logic diagram that carries out the following operations. • When switch one (SW1) is closed, the green pilot light (Green_PLT) turns on. • When switch two (SW2) is closed, the white pilot light (White_PLT) turns on. • When both SW1 and SW2 are closed, the Green_PLT and White_PLT are off, and the red pilot light (Red_PLT) turns on. Step 1 Draw the relay logic diagram for this circuit. Step 2 List the input devices and PLC input port addresses, and then list the output devices and PLC output port addresses. Step 3 Complete the PLC I/O connections on your PLC lab station. Step 4 Draw the PLC ladder logic diagram for the relay logic diagram in Step 1. Step 5 Use Rockwell RSLogix 500 software to create the PLC ladder logic diagram. Step 6 Download the PLC ladder logic diagram into the PLC station. Place the PLC in the run/monitor mode. Step 7 Demonstrate your working PLC system for your instructor. Activity 2 In this activity, you will create a PLC ladder logic diagram that carries out the following operations. • The black switch (SWB) is the emergency stop switch. • When the red pushbutton (PBR) is pressed, the red pilot light (Red_PLT) and motor one (M1) are energized. They will stay on until the SWB is opened.