Electrical & Controls. September 28, 2017

Transcription

1 Electrical & Controls September 28, 2017

2 What is a PLC? Programmable Logic Controller

3 Definition Industrial computer based control system that continuously monitors the state of input devices and makes decisions based upon a custom program to control the state of output devices

4 English please??????

5 Simple Example Functional Description When wall light switch is turned on then turn on the light. When wall light switch is turned off then turn off the light.

6 Complex Description Functional Description If manual is selected and the start push button is pushed (or the pump is already running) and the stop push button is not pushed and the wet well level is not low and the pump is not faulted -OR- -Turn on pump 1 Functional Description If auto is selected and automatic alternate is active and the lead pump is next to run and pump 1 is lead (or the automatic alternate is active and the lag pump is next to run and pump 1 is the lag pump) and the stop push button is not pushed and the wet well level is not low and the pump is not faulted

7 Complex Wiring

8

9 Complex Code

10 Digital Inputs: Push Button Selector Switch Temperature Switch Pressure Switch Float Switch Photo Eye Motor overload Motor Aux Contact

11 Analog Inputs: Pressure Transmitter Temperature Transmitter Level Sensor Flow Meters Motor Speed

12 Digital Outputs: Light Motor Starter VFD Start Command Valve Open/Close Command Horn or Buzzer Solenoid Valve

13 Analog Outputs: VFD Speed Reference Valve Position LCD Readout

14 PLC Manufactures

15 PLC Manufactures

16 What is a HMI? Human Machine Interface

17 What is a SCADA? Supervisory Control And Data Acquisition

18 Definition Software application that presents information to an operator or user about the state of a process, and to accept and implement the operators control instructions

19 HMI/SCADA Manufactures

20 Example: HMI

21 Example: SCADA

22 Instruments

23 Partners: Instruments

24 Motor Troubleshooting Motor not starting? Check for a tripped breaker

25 Motor Troubleshooting Check fusing Qualified Electrician

26 Motor Troubleshooting Overloads protect the motor over current. This fine tunes the over current protection.

27 Motor Troubleshooting COMMON VFD FAULTS

28 Motor Troubleshooting Over Current Motor winding failure Line Clog

29 Motor Troubleshooting Over Voltage Utility Power Failure Spike from Utility

30 Motor Troubleshooting Under Voltage Utility Power Failure Multiple motors starting at the same time

31 Troubleshooting FLOAT SWITCHES Continuity test of float switch leads Grease can keep floats from functioning properly

32 Troubleshooting LED Indicating lights Usually red is bad No lights often a sigh component may have failed or no power

33 Troubleshooting LED Indicating lights Familiarize yourself with common LED lights for your equipment On failure you my notice LED status lights are different than normal

34 Troubleshooting LED Indicating lights PLC Faults need to be determined with software When problems occur, it is usually related to some sort of failure of a component or loose wire or connections. PLC programs do not change on their own. Best way to determine what has failed is online with the PLC

35 Troubleshooting UPS Annoying beeping sound is bad! Batteries usually component that fails

36 Maintenance INSTRUMENT CALIBRATION Verify accurate measurements

37 Maintenance Computer Maintenance Data Backups Windows Updates Anti-Virus Updates

38 Maintenance VFD Maintenance Cooling fan cleaning Review fault history

39 Maintenance UPS Battery Replacement

40 Transformer Oil Testing Takes an oil sample out of the transformer and tests for potential future problems We repair leaking bushings, defective tap changers, and temperature and oil level gauges Customer-friendly notification system assures annual testing of each transformer In-stock, ready-to-go equipment Ready to perform testing, draining, refilling, and repairing on the spot

41 Maintenance I/R Scan Helps determine future/potential failures Locate loose connections Detects overcurrent on conductors Detects components not cooling correctly

42 Questions??

43 Thank you!