( 1 ) In recent years , and Lee Mining PLC product innovation , its
reliability, performance and other advantages have been widely
recognized by users. And Lee mineral widely used in low voltage feed
switch , high Nanda Power supply module plc voltage
power distribution equipment , combination switch , load center and
other products with PLC products are gradually replaced protectors and
ordinary PLC microcontroller products , equipment and mine started when
Lee became some of the PLC mining equipment and advantages of selling
the company's products .
( 2 ) the use of PLC to develop a new
type of solar thermal water heaters, solar water heaters can overcome
the traditional presence affected by climate , temperature instability
and other defects , but also focus on water supply for multiple users.
Siemens S7-200 series PLC control operation of solar thermal water
heaters with water temperature , water PLC Programmable Logic Controller level
and flow control corresponding temperature , level and flow sensors and
PLC analog input extension implementation. Meanwhile , PLC and Siemens
integrated text display T D400 achieve interactive interface for the
collector water heater temperature and water level inside the real-time
online display and settings.
( 3 ) With the development and
social progress of science and technology, automatic doors in everyday
life has also been widely used. Automatic door systems in the past
generally use logic control module , due to the high failure rate , low
reliability , convenient maintenance and other reasons, will be phased
out . Used Mitsubishi PLC automatic door control system as a controller
to a transmitter and a receiver of ultrasonic switch photoelectric
switch as an input device of the system, two different sensor input
control signal to the PLC, the PLC system using code tables , I / O
allocation table and automatic door control actions such as the
implementation process in order to achieve control of the door open or
closed ( rising or falling ) .
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