PROJECT FINAL PRESENTATION

PLC Based Residential Alarm SystemJohn HiddemaUniversity of Idaho - ECE 504 - Spring 2012

PRESENTATION OVERVIEW

Project Goals Project Description

Sensors PLC MODBUS RTU over Serial (RS-232) MODBUS Polling Tool Excel Logger and SMS Utility (VBA Based)

Project Functionality Video Project Development Issues Future Project Additions/Improvements

PROJECT GOALS

Wire inputs to a PLC and learn to program a PLC with ladder logic

Alarm for events Establish local communication to the

PLC via MODBUS RTU over serial (RS-232)

Establish remote notification of events via SMS text messages on cell phone

PROJECT DESCRIPTION

Four sensors (‘arm system’, ‘door alarm’, ‘window alarm’, ‘motion alarm’) wired to PLC Inputs

Ladder logic in the PLC maps PLC Inputs to PLC Outputs (coils)

PLC coil status is polled via MODBUS RTU Poll utility

MODBUS data is continuously logged in real-time and alarms are sent via SMS to homeowners cell phone

PROJECT DESCRIPTION – BLOCK DIAGRAM

PLCDOOR ALARM

ARM SYSTEM

PC with MODBUS POLL & EXCEL

LOGGER AND SMS UTILITY

WINDOW ALARM

MOTION ALARM

LOCAL AUDIBLE ALARM/BUZZER

INPU

TS

OU

TPU

TS

RS232

SENSORS

Email

Verizon SMS Gateway

LOCAL ALARMS

SMS

PROJECT DESCRIPTION - SENSORS

Sensors simulated with four toggle switches on the side of the PLC enclosure

Toggle switches were used instead of actual “field” wiring/sensors to facilitate system development

“Normally-open” contacts used on the toggle switches

Toggle switches mimic magnetic door and window sensors and also a motion sensor with NO/NC contacts

PROJECT DESCRIPTION - SENSORS

PROJECT DESCRIPTION - PLC

DirectLOGIC Micro Programmable Logic Controller (DL05 PLC)

Model used: D0-05AR 8 AC inputs 6 relay outputs, 2A/point I/O Rating: 110/220 (+10%, -15%) VAC

Two communication ports Supports MODBUS RTU master/slave, DeviceNET

slave, Proibus slave and Ethernet networking

PROJECT DESCRIPTION - PLC

PROJECT DESCRIPTION - PLCPLC Program Ladder Logic

Arm Alarm System

Door Alarm (If Armed)

Window Alarm (If Armed)

Motion Alarm (If Armed)

PROJECT DESCRIPTION - MODBUS

“Free” MODBUS polling tool (MODBUS Poll) utilized as a MODBUS master to poll the PLC

Coil (outputs) MODBUS address on PLC starts at address 2048. Four coils polled

MODBUS RTU protocol Serial Connection (RS-232) MODBUS Poll has data logging

capabilities direct to Excel

PROJECT DESCRIPTION - MODBUS

PROJECT DESCRIPTION - MODBUS

PROJECT DESCRIPTION – EXCEL TOOL Custom Excel data logging tool written to

interpret data logs VBA code utilized to interpret coil status and send

pre-defined email via Microsoft Outlook Separate distinct messages are sent for each

event (i.e. “Alarm System Armed”, “Door Alarm” etc.)

Verizon SMS gateway and “vtext” address utilized for text messaging.

For example: 555-555-5555@vtext.com sends a text message to 555-555-5555

PROJECT DESCRIPTION – EXCEL TOOL

PROJECT DESCRIPTION – TEXT MESSAGES

PROJECT FUNCTIONALITY VIDEO

Link:

www.youtube.com/watch?v=ZuekagVs-3w

PROJECT DEVELOPMENT ISSUES

Physical mounting and wiring of the PLC took some time

Learning the DirectSoft programming tool and establishing communication with the PLC was a bit of a challenge

The biggest effort was communicating over MODBUS, establishing the logging, and writing VBA code to interpret the logs and send an email via Outlook

FUTURE PROJECT ADDITIONS/IMPROVEMENTS

Install permanent field sensors for door/window/motion alarms

Install a permanent local audible alarm/buzzer

Possibly add more sensors and actuation (e.g. water sensor > start sump pump)

Improve the functionality and reliability of the Excel Logger & SMS Utility tool