Let's break down and answer each part of the Allen-Bradley Training Exercise 1 step-by-step, as requested: --- ## **STEP 1: Introduction to the Concept** This exercise focuses on basic PLC (Programmable Logic Controller) logic circuits using input and output signals. You are required to analyze timing diagrams and create circuits for three different logic types: **AND/OR circuit, Latching circuit, and Priority circuit**, matching the outputs to the input conditions as shown in the timing charts. --- ## **STEP 2: AND / OR Circuit** **Concept:** An AND/OR circuit uses two types of logic: - **AND:** Output is ON only if all specified inputs are ON at the same time. - **OR:** Output is ON if any one of the specified inputs is ON. **Task:** Make a circuit that lights Output 1 when Input 1 and Input 2 are pressed at the same time or when Input 3 is pressed. **Explanation:** - Output 1 = (Input 1 AND Input 2) OR (Input 3) - Output 1 turns ON whenever Input 1 & Input 2 are both ON together, or Input 3 is ON (regardless of Inputs 1 and 2). --- ## **STEP 3: Latching Circuit** **Concept:** A latching circuit keeps the output ON even after the input is released, until another input turns it off. **Task:** Output 1 is lit when Input 1 is pressed. Output 1 stays lit after Input 1 is released. Pressing Input 2 turns OFF Output 1. **Explanation:** - Output 1 is set (latched) by Input 1. - Output 1 remains ON until Input 2 is pressed (which resets/unlatches it). --- ## **STEP 4: Priority Circuit** **Concept:** A priority circuit assigns importance to certain inputs, allowing them to override others. **Task:** - Pressing Input 1 lights Output 1. - Pressing Input 2 after Input 1 lights Output 2 instead. - Output 2 will only light if Output 1 is lit and Input 2 is pressed. - Input 3 turns OFF both outputs. **Explanation:** - Input 1 → Output 1 - Input 2 (while Output 1 is ON) → Output 2 - Input 3 → Both outputs OFF --- ## **STEP 5: Final Summary (Short Version of Answers)** 1. **AND/OR Circuit:** Output 1 turns ON when (Input 1 AND Input 2) are ON, or Input 3 is ON. 2. **Latching Circuit:** Output 1 latches ON by Input 1, and is reset (turned OFF) by Input 2. 3. **Priority Circuit:** Output 1 is ON with Input 1, Output 2 takes priority when Input 2 is pressed after Output 1, and Input 3 turns both OFF. --- ## **STEP 6: What We Did in Each Step** - **Step 1:** Introduced basic PLC logic circuit concepts. - **Step 2:** Analyzed and explained the AND/OR logic for Output 1. - **Step 3:** Explained the latching logic for Output 1 using Input 1 (set) and Input 2 (reset). - **Step 4:** Detailed the priority logic for Outputs 1 and 2, including the override by Input 3. - **Step 5:** Summarized all final answers concisely. --- **This structured approach ensures a clear understanding and accurate implementation of each PLC circuit type according to the timing charts provided.**