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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

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

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Pvss2 general purpose interface for serial devices

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.

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Pvss2 general purpose interface for serial devices

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.

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