Implementation of customized SCADA for X-Ray Machine Abstract This paper is an effort to enable the Delta PLC (Programmable Logic Controller) DVP14SS to communicate with the Visual Basic 6.0 using Modbus.DLL. The communication between DVP14SS and Visual Basic 6.0 is via Modbus Serial Protocol stated by Delta PLC manufactures. In automated systems there is control supervision, and also health and safety monitoring via supervisory control and data acquisition (SCADA) systems. Values of important parameters such as temperatures, pressures, voltages, etc. are sensed and transferred to monitoring stations in control rooms. After processing the information, decisions are made and supervisory commands are sent to change conditions such as set points or to engage emergency procedures. The data from sensors and set commands to actuators are sent via wired or wireless communication channels. So, communication mechanisms are an integral part of any complex automated system. The S...
