30-07-2011, 03:46 PM
PRESENTED BY:-
HEMANT RAJPUT
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PLC
P – PROGRAMMABLE
L – LOGICAL
C – CONTROLLER
concept of plc was developed in 1969-70.
First plc was made by modicon,france
PLC MANUFACTURER
ALLEN BRADLEY
SIEMENS
MITSUBISHI
MEESUNG (INDIAN)
DELTA
PLC CONTRIBUTIONS
Power supply
Communication
Input module
Output module
Processor
PLC Applications
Microprocessor, similar to that found in a PC, calculator, or your automobile
Extensively used to control manufacturing and treatment processes.
Can also accept directions:
Notification of alarm levels
Types of events to record
AUTOMATION
It is the system which use the controller and SCADA and it is the delegation of human control function to technical equipments
Increase production
Reduce man power
Improves quality
Reduces cost
SCADA
S –SUPERVISORY
C –CONTROL
A – AND
D – DATA
A – ACQUISITION
SCADA was developed in 1987 and they are black boxes and used to see and control from remote control room
Features of SCADA
Dynamic process graphics
Real time trends
Historical time trends
Alarms
Alarms history
Data based connectivity
Device connectivity
USE OF SCADA
SCADA enables a site operator to monitor and control processes from a remote location
Used to monitor and control any type of mechanical and electrical equipment at LF facilities
