What is disadvantages of Programmable Logic Controller?

1. Because it is a new technology, so that should require training.

2. Some applications that perform a single function, is not efficient in the use of PLC.

3. Limited usage environments, high temperatures and harsh vibrations can disrupt electronic equipment on the PLC.

4. Need extra security equipment such as really.

5. PLC is not considered necessary when applied to industrial systems that do not need to change the wiring.