ICS – Control Components
Monday, February 9th, 2009
The following is a list of the major control components of an ICS:
- Control Server. The control server hosts the DCS or PLC supervisory control software that is designed to communicate with lower-level control devices. The control server accesses subordinate control modules over an ICS network.
- SCADA Server or Master Terminal Unit (MTU). The SCADA Server is the device that acts as the master in a SCADA system. Remote terminal units and [..]
ICS Operation
Monday, February 9th, 2009
The basic operation of an ICS is shown in the figure below. Key components include the following:
- Control Loop. A control loop consists of sensors for measurement, controller hardware such as PLCs, actuators such as control valves, breakers, switches and motors, and the communication of variables. Controlled variables are transmitted to the controller from the sensors. The controller interprets the signals and generates corresponding manipulated variables, based on set points, which [..]