A control system reads sensors, runs a program and drives motors, valves and other actuators, while operators follow and adjust the process on an HMI or in SCADA. Industrial control systems are built for continuous operation in cabinets and machines, with standard I\/O signals, fieldbuses and industrial Ethernet. SCN supplies Yaskawa SLIO, MICRO and 300S PLCs, Bihl+Wiedemann AS-Interface, Weintek HMIs, Wieland samos PRO safety controllers, Inter Control digsy mobile control systems, Progea Movicon SCADA and Moxa remote I\/O.<\/p>\n
The range covers PLC systems<\/a> from micro PLCs to modular controllers and distributed I\/O, safety PLC<\/a>, industrial HMI and operator panels<\/a>, SCADA<\/a> software, AS-i products<\/a> with gateways, safety monitors, I\/O modules and motor modules, protocol gateways<\/a> and mobile control systems<\/a> with controllers, CAN I\/O and displays for mobile machines. Switches, routers and protocol gateways for the network are under Network Products<\/a>.<\/p>\n How to choose:<\/strong> count the I\/O and the cycle time the process needs, choose the fieldbus or industrial Ethernet the rest of the plant uses, check whether safety functions require a safety PLC up to PL e\/SIL 3, and decide how operators will work \u2013 on a local HMI, with SCADA for the whole site, or both.<\/p>\n A control system is the hardware and software that keeps a machine or process doing what it should: sensors measure, a controller such as a PLC compares the values with the program or setpoint, and actuators respond. A small machine may need one compact PLC with an HMI, while a plant combines PLCs, distributed I\/O, safety controllers and SCADA over industrial Ethernet.<\/p><\/details>\n SCADA (Supervisory Control and Data Acquisition) is software that collects data from PLCs, RTUs and meters across a plant or distributed sites and presents it to operators as overview screens, alarms, trends and reports. It supervises rather than runs the fast control loops, which stay in the PLCs. Progea Movicon is one example, with drivers for Modbus, OPC UA and the major PLC brands.<\/p><\/details>\nFrequently asked questions<\/h3>\n
What is a control system?<\/summary>
What is SCADA?<\/summary>