"PSS-3203编程手册：完整且详细的编程指南" - CSDN文库

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PST & PSS & PSH SERIES PROGRAMMABLE POWER SUPPLY

PROGRAMMER MANUAL

⎯ 7 ⎯

The RS232 connection testing

If you want to test whether the RS232 connection is working or not, you

can send a command from computer. For instance, using a terminal

program send the query command

*idn?

should return the Manufacturer, model number, serial number and

firmware version in the following format:

WK.TMPRO,PST-3202,A000000,FW1.00

If you do not receive a proper response from the power supply, please

check if the power is on, the RS232 baud rate are the same on both sides,

and all cable connections are active.

4. INPUT AND OUTPUT QUEUE

The design of 128 bytes input queue and 128 bytes output queue for

storing the pending commands or return messages is to prevent the

transmitted commands of remote control and return messages from

missing. As the maximum stored capacity for Error/Event Queue is 20

groups of messages, it should be noted that input data exceeding the

capacity by using these buffers will cause data missing.

5. COMMANDS AND SYNTAX

The GPIB commands of the programmable power supply are

compatible with IEEE-488.2 and SCPI standards

SCPI

SCPI (Standard Commands for Programmable Instruments) is a standard

that created by an international consortium of the major test and

measurement equipment manufacturers. The IEEE-488.2

syntax has been

adopted by SCPI to provide common commands for the identical

functions of different programmable instruments.

PST & PSS & PSH SERIES PROGRAMMABLE POWER SUPPLY

PROGRAMMER MANUAL

⎯ 8 ⎯

Figure 3 the relationship between IEEE-488.1, IEEE-488.2, and SCPI

As shown in the figure 3, the IEEE-488.1 standard locates at layer A, the

layer A belongs to the protocol of interface function on the GPIB bus.

The source handshake (SH), acceptor handshake (AH) and talker are

included to this layer (10 interface functions totally).

At layer B, the syntax and data structure could be the essence of entire

IEEE-488.2 standard. The syntax defines the function of message

communication, which contain the <PROGRAM MESSAGE> (or simply

“commands”) and <RESPONSE MESSAGE>. The two kinds of messages

represent the syntax formation of device command and return value. The

data structure is the constitution of status reporting, which IEEE-488.2

standard have been defined.

The common commands and queries are included to layer C. Commands

and queries can be divided into two parts: mandatory and optional.

Commands modify control settings or tell the instrument to perform a

specific action. Queries cause the instrument to send data or status

information back to the computer. A question mark at the end of a

SCPI

IEEE-488.2 IEEE-488.2

SCPIIEEE-488.1

AABBCCDD

Interface Function

Syntax & Status Data Structure

Common Command & Queries

SCPI

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