1. PLC Based Residential Alarm System John Hiddema University of Idaho - ECE 504 - Spring 2012

2.  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

3.  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

4.  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

5. PLC DOOR ALARM ARM SYSTEM PC with MODBUS POLL & EXCEL LOGGER AND SMS UTILITY WINDOW ALARM MOTION ALARM LOCAL AUDIBLE ALARM/BUZZER RS232 SENSORS Email Verizon SMS Gateway LOCAL ALARMS SMS

6.  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

8.  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

10. PLC Program Ladder Logic Arm Alarm System Door Alarm (If Armed) Window Alarm (If Armed) Motion Alarm (If Armed)

11.  “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

14.  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

17.  Link: www.youtube.com/watch?v=ZuekagVs-3w

18.  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

19.  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