muhammad jawhar

1. 1
Lab
Student Name: Muhammad jawhar
Class: 4 Stage – Group:A1
Course Title: PLC Lab.
EXP NO: 2
EXP. Name: introduction to control apparatus, and
Intermittent Operation of Asynchronous motor with aid of
PLC
College of Engineering
Salahaddin University-
Erbil Academic Year
2021-2022

2. 2
Introduction
due to the fast performance of DC motors, these motors are regulated in a wide
range of speeds and can be used in many applications. The main advantage of
using DC motors in today's world is the ability to easily control the speed and
angle of the motor. This project is about controlling the speed of DC motor by
using Programmable Logic Controller. The controller has more advantages than
conventional control circuits. The benefits can be noted such as reducing the size
of the control panel, very low energy consumption, Durable Equipment, Proper
operation in the worst cases. Using PLC for controlling industrial systems is
initiated in 1968 and, its development has been greatly accelerated in recent
years.
A simplified approach for speed control of a DC motor using programmable
logic controller (PLC) is presented. This approach is based on providing a
variable dc voltage to armature circuit of dc motor from a fixed dc supply
voltage via a PLC for supply voltage
control method. Relay based PLC control method is used for switching on or off
the resistors which are connected in series with armature and field circuits of dc
motor depending on the reference (command) speed for armature and field
control methods. It is easy, fast and
effective by this method of control to vary motor speed. The proposed system is
suitable for different industrial applications such as subway cars, trolley buses,
or battery-operated vehicles.
In this project we made an attempt to convert the conventional Dc motor into
computer controlled Dc motor which is an automatic and programmed using a
M3 soft software to control from computer using a programmable logic
controller(PLC).

3. 3
1. GENERAL FEATURES OF Y-0030-A PLC APPLICATION MODULES
General structure of Y-0030A application modules is composed of components
above. These components can show changes according to the type of the
application module. Components and their usages are listed below.
1 . DC 24V power input. DC 24V power that is required for application circuits is
applied with the external power supply. Pay attention to the polarity (+,- polars)
when applying DC 24V power. If the application modules are to be used with D-
sub25 connecting cable, there is no need to apply energy to the power input.
2 . Connecting cable provides the connection between 8 bit digital input/output
points of PLC and the module. How inputs/outputs between the application and
digital inputs/outputs from this cable are used is shown in input/output tables of
the application. On the connecting cable, 24V DC supply voltage that is required
for the module is available.
3 . Connecting cable provides the connection between 8 bit digital input/output
points of PLC and the module. There are conductors for 2 analog input and 1
analog output in the cable. How inputs/outputs between the application and digital
inputs/outputs from this cable are used is shown in input/output tables of the
application. Y-0030A PLC APPLICATION MODULES 2
4 . Digital inputs/outputs of the application are transferred to D-Sub25 Male
connector in each application module. Input/output points on this socket and
inputs and outputs that are used in the application are specified in application
input/output table.
5 . Analog inputs/outputs of the application are transferred to D-Sub25 Male
connector in application modules where analog input/output connections are used.
Input/output connections that are used in the application are shown in application
input/output table. In some application modules, there is no need of analog
inputs/outputs so these connection sockets are not included in the module.
6 . When D-Sub25 and D-Sub15 connection cables are not used for input/output
connections of the applications, connections can be made with the help of 2 mm

4. 4
sockets. For inputs and outputs that are used in the applications, 2 mm sockets on
the board can be used. ( ATTENTION: If the application modules D-sub25
and/or D-sub15 are to be used with connection cables, you don't need to use
these cables at the same time with 2 mm test cables between application
circuits (7) and PLC input/output points (6) on the module.
7. It is the part where application circuits are present. All input/output points of
the application can be externally connected to the PLC through 2 mm sockets.
3 1.1 . Connection Structures of Y-0030-A PLC Application Modules They can
make individual connections between PLC and input/output points of the
applications. Besides, D-Sub connection cables and all inputs/outputs can be
connected directly at a time over Digital I/O link (Y-0030-M04) and/or Analog
I/O link (Y-0030-M06) module cards on modular PLC platform (Yıldırım
Electronic product Y-0030M).
In Figure 4 and Figure 5, connection parts of D-sub 25/D-sub 15 male and female
connectors that are used in PLC applications can be seen. In Figure 6, connection

5. 5
principles between application modules and I/O link modules can be seen.
4 mm sockets are used for connections in asynchronous application modules. Y-
0030- A01/06 PLC I/O LINK module should be used in order to make the
connection between PLC and asynchronous application modules via 4 mm
sockets.

6. 6
Figure 7: PLC i/O LINK module with Digital I/O LINK card, or PLC connection.
Structural diagram of input/output relation between any PLC and controlled
system can be seen below.

7. 7

8. 8

9. 9

10. 10
Process Steps:
Make the connections with 4 mm test cables according to controller circuit in the
figure 10.and Make motor electric terminal connection according to the star
connection. then Make the connections with 4 mm test cables according to power
circuit in the figure 11. After taking the necessary measures, apply DC 24V energy
to the controller circuit and apply 3 phase AC 380V to the power circuit. Press
START button. Examine the movement of the motor.
And Press stop button when STOP button is pressed and observe the operation of
the motor.
Close all energy sources on the circuit. Undo the controller circuit in Figure 10
however leave power circuit as it is. In place of controller circuit, install the circuit
again according to the PLC technology schema in figure 13. Make PLC
inputs/outputs with 4 mm test cables over PLC I/O LINK module. Open Step 7-
Micro/Win program. Open ...A01 UygulamalarıA01Uyg1.mwp file in the
application CD and install it to the PLC. Set PLC to the RUN position. (
Application program is prepared for CPU 224XP. Program lines for different
PLC's must be taken as samples and must be arranged for various PLC's.) After
taking the necessary measures, apply DC 24V energy to the controller circuit and
apply 3 phase AC 380V to the power circuit. Press START button. Examine the
movement of the motor .and Press stop button when STOP button is pressed and
observe the operation of the motor.
Discussion
1 - Introduction to control apparatus, and Intermittent Operation of
Asynchronous motor with aid of PLC
Overcurrent Relay: A relay that operates or picks up when it's current exceeds a
predetermined value (setting value) is called Overcurrent Relay. Overcurrent
protection protects electrical power systems against excessive currents which are
caused by short circuits, ground faults, etc. overcurrent relays can be used to
protect practically any power system elements, i.e. motors, transformers,
generators, transmission lines
Overcurrent relays activates for the purpose of:
Detect abnormal conditions .Cost of protection (against cost of internal hazards).

11. 11
Dependability/reliability.
Isolate faulty part of the system.
Speedy fast operation to minimize damage and danger.
Discrimination isolate only the faulty section.
2 - Discuss and research when overcurrent relay will activate. (Note: We
can also use the overcurrent relay by pressing test button without waiting
motor to draw over current.)
The overcurrent relay plot in either the rapid or planned enlistment write isn't
generally attractive for transmission lines due fundamentally to varieties in the
extent of the overcurrent under different framework working conditions and to
the relative estimation of the base overcurrent and the full load current of the
line.
3 - . Discuss how N.C contact of overcurrent relay will be connected to the
PLC.
The most elementary objects in Ladder Diagram programming are contacts and
coils, intended to mimic the contacts and coils of electromechanical relays.
Contacts and coils are discrete programming elements, dealing with Boolean (I
and 0; on and off; true and false) variable states. Each contact in a Ladder
Diagram PLC program represents the reading of a single bit in memory, while
each coil represents the writing of a single bit in memory, Discrete input signals
to the PLC from real-world switches are read by a Ladder Diagram program by
contacts referenced to those input channels .In legacy PLC systems, each
discrete input channel has a specific address which must be applied to the
contact(s) within that program. In modern PLC systems, each discrete input
channel has a tag name created by the programmer which is applied to the
contact(s) within the program. Similarly, discrete output channels - referenced
by coil symbols in the Ladder Diagram - must also bear some form of address or
tag name label.