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PVSS2 General Purpose Interface for serial devices

PVSS2 General Purpose Interface for serial devices. Date: 17.06.2004. Serial Devices. Serial device: a device which communicates with the outside world through an interface where the data are shifted in and out in a serial way (one after the other).

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PVSS2 General Purpose Interface for serial devices

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  1. PVSS2 General Purpose Interface for serial devices Date: 17.06.2004 Serial Devices Serial device: a device which communicates with the outside world through an interface where the data are shifted in and out in a serial way (one after the other) Most successful serial data standard for PC and telecom applications is RS-232. Similarly, RS-485 and RS-422 are among the successful standards for industrial applications. The standards are not directly compatible. Examples of serial devices: The PC mouse, modems, numerous measurement equipment, (volt/ampere meters, multimeters) PC controlled industrial equipment, etc. RS-232: single-ended signals standard for serial communication with Baud rates of 2400 to 19200 over distances from 900 to 15 meters. Data-rate capability of about 1Mbps. RS-422: differential signals standard for transmission over much greater distances. RS-485: improved version of the RS-422 standard for longer line lengths and more nodes on a bus system. For more info: type: “how to”, RS-232, RS-422, RS-485 in Goooooogle 1

  2. PVSS2 General Purpose Interface for serial devices Date: 17.06.2004 PVSS2 and serial devices • Serial devices may be connected to the PVSS2 SCADA system in several ways: • Use the COM port of the PVSS2 controller and access the device with the IEC driver. • IEC stands for International Electrotechnical Commission, which has given its name to the • protocol IEC 60870-5-101for serial connections. See under PVSS2 management and drivers. • Use the PVSS2 Applicom driver and an Applicom PCI-1000 card. See under PVSS2 management • / Drivers and the Applicom website. • Use the PVSS2 OPC client connected to a Matrikon OPC server talking a RS-232 protocol to a • COM port. See under PVSS2 management / OPC and the Matrikon website. • Use a virtual COM port in the PVSS2 controller. The serial port of the device connects to a • special card, which communicates via TCP-IP (LAN) with the virtual COM port in the controller. • This could be seen as a remote extension of a COM port. See under www.digi.com/products • and then Terminal Servers/Portserver TS2/4. There are more solutions, however the above mentioned use the software resources, which come with PVSS2. 2

  3. PVSS2 General Purpose Interface for serial devices Date: 17.06.2004 The Heinzinger PNC 150000KV Very High Voltage supply This power supply will provide a 100KV DC voltage to the central electrode of the Alice TPC Field Cage. It will be accessed by the DCS via an RS-232 interface and controlled by an SCPI commands set. SCPI stands for Standard Commands for Programmable Instruments, which is a sort of IEEE 488.2 (GPIB) like commands set. SCPI commands: These are alpha-numerical strings as: VOLT_10000 or MEAS:CURR? , which means set 10KV at output and measure actual output current. Selected Interface Option: IEC driver in PVSS2 with a redundant controller PC. Present Status: Controller PC loaded with PVSS2 version 3.0 and starting to setup test project using the IEC driver. Future Activities: Implement the full control of this device with the IEC driver in PVSS2. Propose a common solution for serial devices, which can be included in the IT-CO Framework for PVSS2. 3

  4. PVSS2 General Purpose Interface for serial devices Date: 17.06.2004

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