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Property

Value

Sector

Standard Protocols

Group

Test Instruments

Connector

SCPI Protocol

Name

SCPI

Protocol

SCPI

Test and measurement instruments over TCP/IP, using SCPI commands.

Connectors Library → Browse By Connector Group → Standard Protocols → SCPI Protocol Connector

  • Name: SCPI
  • Version: 1.0.0.01
  • Protocol: SCPI (Standard Commands for Programmable Instruments)
  • Interface: TCP/IP
  • Runtime: Multiplatform (.NET Standard 2.0)
  • Configuration:
    • Devices / Protocols

Table of Contents
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Overview

The SCPI Protocol connector reads and writes settings and measurements of SCPI instruments, such as power supplies, multimeters and signal generators, over a TCP socket. The connector operates as a Master. Each point holds one SCPI command header.

Communication Driver Information

Driver name

SCPI

Assembly Name

T.ProtocolDriver.SCPI

Assembly Version

1.0.0.01

Protocol description

SCPI Protocol Connector

Interface

TCP/IP

Multiplatform

True

Procedure

  1. In Devices → Channels, create a channel and select the protocol SCPI Protocol Connector.
  2. In Devices → Nodes, create a node on the channel and set the Station to the IP address and TCP port of the instrument. See Node Configuration.
  3. In Devices → Points, add one point per tag. Set Address to a SCPI command header, for example :MEAS:VOLT:DC. See Points Configuration.
  4. Start the runtime.

Channel Configuration

Protocol Options

  • BlockSize: maximum number of points per request. Fixed at 8192.

Settings

TCP/IP:

  • NodeConnections: maximum number of parallel requests sent to each node. Default: 1.

Node Configuration

Station Configuration

Station syntax: <IP address>;<Port number>

  • IP address: IP address of the instrument.
  • Port number: TCP port of the instrument SCPI socket. Default: 5025.

Example: 192.168.1.1;5025

Points Configuration

Address

The Address is a SCPI command header without the trailing question mark, for example :MEAS:VOLT:DC, :SOUR:VOLT or *IDN.

Read

  • The connector appends ? to the header and ends the message with a line feed.
  • Points on the same AccessType go out in one message, joined with ;:. The connector splits the reply at commas and assigns the fields to the points in order.
  • Each reply field arrives as text. FrameworX converts it to the type of the tag.

Write

  • The connector sends the header, a space and the tag value, and ends the message with a line feed, for example :SOUR:VOLT 5.
  • The IEEE 488.2 common commands *CLS, *ESR, *IDN, *OPC, *RST, *STB, *TST and *WAI go out without a value.
  • Points in a WriteGroup AccessType go out together in one message.

Driver Revision History

SCPI Revision History

Version

Notes

1.0.0.1

Removed leftover debugging calls that could interrupt the connector when the runtime started or sent commands.

1.0.0.0

Initial documentation release.

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