SCPI Protocol Connector

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

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

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.

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

Related Pages

• Devices Module
• Devices AccessTypes Reference
• Standard Protocols

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