EN. MUHAMAD NABIL BIN MANSOR
pengenalan
Sejarah PLC
Apa itu PLC?
Litar kawalan relay
Relay
Panel Kawalan
Sistem Relay
Litar kawalan relay
Panel Kawalan Sistem Relay
Relay terminal
Litar kawalan relay
Litar Kawalan Relay
Gantian kepada Relay
Simbol Contact
Simbol Coil
Gantian kepada Relay
PLC
Relays
Timers & Counters
Gantian kepada Relay
Litar Kawalan
Relay
Rajah Tetangga
Gantian kepada Relay
Kendalian Data
2
1
3 4
5
Prod Pass Reject
AA 33 4
BB 27 3
CC 43 8
PLC
Operasi Aritmetik
+
-
x
/
Isyarat Analog
Kelebihan Menggunakan PLC
Kelebihan Menggunakan PLC
PLC vs. Relay
When I first started programming PLCs it was still questionable if a PLC was
necessary over just relay control. With PLC prices going down, size shrinking, and
performance of PLCs improving over the years this has become less of a battle. Yet
the designer has to ask themselves if a PLC is really overkill for their application.
Some questions should be asked.
Is there a need for flexibility in control logic changes? Will there be frequent
control logic changes? Will there be a need for rapid modification?
A lot companies believe they will never change a design but more often then not
ideas and goals do change and modifications will need to be made. Do you want to
do that in hardware (relays) or software (PLC)?
Must similar control logic be used on different machines?
It's so much easier to download a program then build another panel.
PLC vs. Relay
Is there a need for future growth?
A PLC can easily accept a new module in a slot or get an expansion base.
Is there a need for high reliability?
PLCs are seen as more robust over indiidual components.
Is downtime a concern?
Any change or troubleshooting on a relay system means the system might have to
go offline. Changes in a PLC can often be made online with no downtime.
Are space requirements important?
Based on the number of relays a PLC can be a real space saver.
Are increased capability and output required?
PLCs can be faster then their mechanical counterparts.
Are there data collection and communications required?
Only possible with a PLC or computer.
What are the overall costs?
There's a certain price
PLC vs. Dedicated Controller
A dedicated controller is a single instrument that is dedicated to controlling one parameter such as a PID controller measuring a temperature for heating control. They have the advantages of an all in one package, typically with display and buttons. This can be a very good thing to use in simple applications. A PLC these days can compete price wise and functionally with these controllers especially if more than one controller is needed. PLCs offer a greater degree of flexibility too because the can be programmed to handle all sorts of different scenarios.
PLC vs. PC (Personal Computers)
The PLC vs. PC debate has been going on for years and I'm not going to
attempt to give the definitive answer. They both have their pros and cons. What
often happens is that the two are used for their strengths in different parts of
the factory.
PLC vs. PC (Personal Computers)
PLC vs. PC (Personal Computers)
Pengeluar PLC
Pengeluar PLC
Jenis-jenis PLC
Nano Brick Style
Expandable to 44 I/O
Low Cost Model 20 I/O
max
ZEN
Compact PLC Series
CP1H CPM1A CPM2A
CPM2B CPM2C
The all in one PLC Compact & economical The universal small
machine controller
Brick Style Micro
Controller Board Package
The versatile slim-line
controller
Modular PLC Series
CQM1H
The original backplane-less
modular PLC
CJ1
The entry-level modular PLC
with a big potential
Rack PLC Series
CS1
Suitable for any job: the
rack-based PLC with over
200 types of I/O units
CS1D
The dual-redundant PLC
system for never-fail control
Bagaimana Memilih PLC
Bagaimana Memilih PLC
Apa yang boleh PLC lakukan
Apa yang boleh PLC lakukan
Flow Rate
Float Level
Oxygen Level
Apa yang boleh PLC lakukan
Motor pump
Valve
Mixer