SCADA and Networking

What is a SCADA system?

SCADA means Supervisory Control and Data Acquisition. It refers to a system where most control is handled at the local level by the PLC but where overriding commands may be sent remotely by an operator.

Sometimes the acronym SCADA is used informally to mean the network that interconnects the PLCs, the HMI, the PC and other intelligent devices.

The SCADA system relies upon communication links which might vary from simple modems accessing data across phone lines to radio links and satellite communications. In a true SCADA system, if the communication system fails, the local PLC will continue to run the process - the SCADA system provides supervisory control only.

Experience

Our Systems Integrators have experience with the following remote paging systems, networks, and device integration.

• United Security Products
• Wonderware SCADAlarm

• DDE
• DeviceNet
• DF1 - serial communications
• DH - Data Highway
• DH+ - Data Highway Plus
• K-Sequence
• Modbus
• OPC - Object Linked and Embedded for Process Control
• RIO - Remote I/O
• RS232
• RS485
• SuiteLink
• TCP/IP - Ethernet
• Tiway

• ABB TotalFlow - Gas Chromatograph
• ABB TotalFlow - Flow Meter
• Daniels - Gas Chromatograph
• Honeywell - Corrosion Monitoring System
• Micro Motion - Mass Flow Meter
• Multilin - Power Management Relay
• Notifier - Fire Alarm Panel
• YZ - Chemical Injection Skid