Post Tagged with: "s7 300"

What does PLC consist of?

What does PLC consist of?

Controls, PLC 13 Tháng Sáu, 2014 at 12:57 chiều

A typical PLC can be divided into parts, as illustrated in Figure 8 which are Central Processing Unit (CPU) Input/output (I/O) Power Supply Programming Device We shall briefly discuss each part here. Central Processing Unit (CPU) The processor (CPU) is the “brain” of the PLC. A typical processor usually consists of a microprocessor for implementing the logic and controlling theRead More

Why Use PLC?

Why Use PLC?

Controls, PLC 13 Tháng Sáu, 2014 at 12:49 chiều

The softwiring advantage provided by programmable controllers is tremendous (Figure 5 shows a practical industrial example). In fact, it is one of the most important features of PLCs. Softwiring makes changes in the control system easy and cheap. If you want a device in a PLC system to behave differently or to control a different process element, all you haveRead More

What is a PLC?

What is a PLC?

Controls, PLC 13 Tháng Sáu, 2014 at 12:34 chiều

Programmable logic controllers (shown in Figure 1) are now the most widely used industrial process control technology. A programmable logic controller (PLC) is an industrial grade computer that is capable of being programmed to perform control functions. The programmable logic controller is designed for multiple input and output arrangements, extended temperature ranges, immunity to electrical noise, and resistance to vibrationRead More

What is Instrument location layout and Junction box location layout?

What is Instrument location layout and Junction box location layout?

Instrumentations 10 Tháng Sáu, 2014 at 3:54 chiều

What is an instrument location layout? Instrument location layout is a layout which indicates the exact location of instrument/junction box, trench/trays etc. Trench and duct is the path for primary cable and tray is the path for secondary cables. Tray is either made of metals or FRP (Fiber reinforced plastic). What is Junction box and Junction box location drawing. JunctionRead More

Essential documents required for an instrument engineer.

Essential documents required for an instrument engineer.

Instrumentations 10 Tháng Sáu, 2014 at 3:23 chiều

As i said in my previous post here i am going to explain about the documents which is essential for instrument engineers.Four types of documents are mainly used by instrumentation engineers. Instrument index. An instrument index is a consolidated list of all instruments which is used in the plant.Instrument index is made according to the P&ID.In this all instruments tagsRead More