Mitsubishi AL-20MR-D - User Manual

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Welcome, and thank you for purchasing a Mitsubishi Alpha simple application controller.
In your pack you will find:
1. Fax-back registration and free training form
2. Mitsubishi Alpha programmable controller
3. Mitsubishi Visual Logic programming software on CD
4. Programming cable
5. This quick start guide in hard copy and electronic copy on the Visual Logic CD
The purpose of this quick start guide is to provide new users with enough knowledge to get
started installing and programming Mitsubishi Alpha’s.
The Mitsubishi Alpha controllers host many advanced features. All these features are not
covered here. For a detailed discussion of advanced features please refer to the relevant
technical manuals.
Your Alpha is provided with the following manuals:
• Hardware manual – Physical and electrical information
• Programming manual – Function blocks, keypad and direct programming
• Software manual – Function blocks and programming with a PC
You can find these on your Mitsubishi Visual Logic CD.
This guide applies to both α and α2 controllers. “Alpha” refers to both α and α2.
This document will guide you through the following lessons:
1. Important features of the Mitsubishi Alpha programmable controller
2. How to wire your Alpha’s power supply, inputs and outputs
3. A Quick introduction to programming the Alpha
4. How to program your Alpha using the front keypad and LCD screen
5. A Quick introduction to Visual Logic programming software
6. How to write a simple program using your PC and Visual Logic
7. How to write a more complex program using your PC and Visual Logic
8. An example program for a Manual/Automatic Ventilation Fan
9. An example program for time switched lighting
10. Converting ladder Logic to Alpha’s Logic and Function blocks
Q u i c k S t a r t G u i d e
Mitsubishi Alpha / Alpha2
Programmable Controller
The contents of this document are subject to change without prior notice. There may be variations
from the illustrations. NHP accepts no liability for damage or injury resulting from the use of the
contents of this document. Examples in this document are for demonstration purposes only.
All rights reserved.

Mitsubishi AL-20MR-D Specifications

General

I/O Points	20
Input Points	12
Output Points	8
Output Type	Relay
Power Supply	24V DC
Input Voltage	24V DC
Type	PLC
Programming Language	Ladder Logic
Humidity	5% to 95% (non-condensing)
Storage Temperature	-25 to 70°C

Summary

How to Wire Your Alphas Power Supply, Inputs and Outputs

100 V AC - 240 V AC Power Supply, Inputs and Outputs

Wiring instructions for AC power supply and inputs on 100-240V AC Alpha models.

24 V DC Power Supply, Inputs and Outputs

Instructions for wiring 24V DC power supply, sourcing, and sinking inputs.

Wiring the Output Terminals

Diagrams and notes for wiring relay type output terminals on Alpha controllers.

How to Program your Alpha Using the Front Keypad and LCD Screen

How to Enter Run, Stop and Programming Mode

How to Choose a Function Block and Connect to an Input

Guide to selecting and connecting function blocks to input terminals.

How to Set Up a Function Block

Steps to configure parameters for a Delay function block (On-delay/Off-delay).

How to Connect a Function Block to an Output

Procedure for connecting a function block's output to an output terminal.

A Quick Introduction to Visual Logic

How to Install Visual Logic on your PC

Visual Logic Programming Environment

Overview of the Visual Logic software interface and its components.

The Function Block Diagram (FBD) Window

Explanation of the FBD window for programming, simulation, and monitoring.

The System Sketch Monitoring Window

Visual Logics Modes

Simulation Mode

Using Simulation mode to debug programs before controller download.

Monitor Mode

How to Write a Simple Program using your PC and Visual Logic

Create a Program

Steps to create a new project and add input/output blocks.

Simulate your program

Configure your COM port

Download and Monitor your program

Procedure for downloading programs and monitoring execution on the controller.

How to Run a Program on Your Controller from Visual Logic

How to Stop a Program on Your Controller from Visual Logic

How to write a more complex program using your PC and Visual Logic