PLC Schneider

Based on the book I read in the 1980s still unaccounted PLC expensive price, but at this time can easily be found with a relatively cheap price. Several companies make computers and electronic PLC largest product sold at that time. Some companies such as Schneider, who produced one of the TSX Micro PLC 3722. PLC market growth reached 80 million dollars in the year 1978 and one billion dollars per year until 2000 and this figure continues to grow, given the increasingly widespread use, especially for process control in industry, in medical devices, household appliances.PLC manufacturer has designed such that users can easily control and logic functions in just a few hours. Basic functions which are widely used among other things: logic contacts, timer (timer), count (counter), etc..

PLC TSX Micro 3722 is a class Telemecanique Modicon PLC series, produced by Schneider Electric. There are three types of classes Schneider Electric PLC output classes, Merlin Gerin, Square D and Telemecanique. PLC TSX 3722 is the final product of the TSX 37XX series and now it is no longer manufactured. As shown in Figure below is a TSX Micro PLC 3722 final product. PLC TSX Micro 3722 has two internal channels with a frequency counter up to 10 kHz. We can use it to up-counting, down-counting or up / down counting. Counter is accessed with a standard 15 pin serial connector SUB-D. Counter function parameter is defined in the configuration software.

Schneider PLC Programming

TSX37 PLC programming is done by natural computer windows operating system, so easy in use. TSX 37 PLC has had his own software to memrogramnya, namely PL7 Junior Micro System. PL7 software presents some form of language and how to program TSX 37 PLC, among others:

a) The Languages Ladder or graphic language
Language is a drawing of this type of relay into the program, so the ladder language is very suitable for combinational system process that presents basic elements, namely contactor and coil. Numerical calculations can be programmed using the language of this type with a write operation within the blocks that have been provided by the software.

b) Language list boolean or language instruction
This type of language can be considered as a machine language for writing numerical operations or logical process.

c) structured text language
This type of language allows the creation of various control algorithms on PLC. Structured text language is a language type of data processing using structured writing of logical and numerical processes.

d) Language grafcet
This language is used to represent the operation of a sequential control systems and structured in a way grfis.

In executing the program, the PLC requires a scan time for one cycle of execution. Time scan consists of several processes, namely internal processing, the reading of input, output and expenditure processing program. Processing involves the ignition status indicator light, the detection mode, or STOP RUN, and others. Reading process input is the process of reading the input module is used. PLC program processing is a process in accordance with the input data processing program. Expenditure process is the process of PLC output in extracting the data to be released is added to the PLC. All this process is done sequentially and will always be repeated.