In this article, we will learn about PCS 7.
PCS means a Process Control System is an integrated DCS control system developed by Siemens.
It uses a Siemens Simatic hardware platform and TIA software.
In DCS, the location of the processor, I/Os, and servers are distributed throughout the plant. You can not find any defined central location like PLC.
PCS 7 is a hybrid type controller means it has both characteristics of the DCS and a PLC.
It uses an s7-400 CPU. In DCS term it is called AS-400. AS stand for an automation system.
PCS 7 Control System Layout
At the top level, it has a device like,
- PC based engineering system
- Operator system client
Both are connected with the operator system server via a communication cable.
The communication protocol may be ethernet or a PROFIBUS, which is Siemens standard communication protocol.
Now we know that the operating system and client and main engineering system which then connected via a communication protocol. This top-level connection is called a terminal bus.
The operator system server is connected to another connecting device normally an ethernet switch. This level is called a plant bus.
From the plant bus, the connection goes to an automation system which is a processor AS-400.
From the processor, it goes to the I/O module. Field devices connected to I/O modules.
The operator system server is used to send and receive graphical representation to the operator server-client (HMI).
The automation system is used to solve the logic, monitor, and control the field devices.
Siemens PCS 7
Below is a typical structure of the PCS 7 control system.
The basic PCS 7 includes AS-OS engineering station which is called a Simatic manager. This is a modified version of the step 7 software.
The operator system client is an HMI software is based on WinCC professional.
In addition to the engineering station, it covers a wide variety of software like,
- Continuous and batch control
- Material pathway control
- Intelligent process device management
- Enterprise-wide data connectivity
I hope you have an idea about PCS 7 software and its structure now.
Still, you have a question, then put your question down in the comment section.
Author: Suhel Patel
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