What are the advantages and disadvantages of a modular plc's?

Answer 1

Advantages

Publicly traded companies are able to raise funds and capital through the sale of its securities. This is the reason publicly traded corporations are important: prior to their existence, it was very difficult to obtain large amounts of capital for private enterprises.

The financial media and city analysts will be able to access additional information about the business.[clarification needed]

DisadvantagesPrivately held companies have several advantages over publicly traded companies. A privately held company has no requirement to publicly disclose much, if any financial information; such information could be useful to competitors. For example, publicly traded companies in the United States are required by the SEC to submit an annual Form 10-K containing a comprehensive detail of a company's performance. Privately held companies do not file form 10-Ks; they leak less information to competitors, and they tend to be under less pressure to meet quarterly projections for sales and profits.

Publicly traded companies are also required to spend more for certified public Accountants and other bureaucratic paperwork required of all publicly traded companies under government regulations. For example, the Sarbanes-Oxley Act in the United States does not apply to privately held companies. The money and income of the owners remains relatively unknown by the public

Answer 2

Some advantages of modular PLC are that they have multiple I/O modules, enabled mixing and matching, able to be upgraded later on, and better expansion options, and easier troubleshooting. The main disadvantage is that it is expensive.

Answer 3

The advantages of using modular programming:

• fewer bug because each set of programming commands is shorter
• algorithm is more easily understood
• many programmers can be employed, one on each of the modules
• programmers can use their expertise on particular techniques
• testing can be more thorough on each of the modules
• allows library programs to be inserted
• all of which saves time and means the finished program can be completed more quickly

The disadvantages of using modular programming:

• can lead to problems with variable names
• means documentation of modules must be thorough
• can lead to problems when modules are linked because link must thoroughly tested

Answer 4

One disadvantage of a PLC is that original owners may lose control. Another is that they face problems such as slow decision making.