GW Instek PST series Programming Manual - Manual (Page 7)

PST & PSS & PSH SERIES PROGRAMMABLE POWER SUPPLY
PROGRAMMER MANUAL
⎯ 11 ⎯
Table 1 defines the Boolean and other parameter types for the
programmable power supply.
Parameter Type Description Example
Boolean Boolean numbers or
values
0, 1
NR1 Integers 0, 1, 18
NR2 Decimal numbers 1.5, 3.141, 8.4
NR3 Floating point numbers 4.5E-1, 8.25E+1
String Alphanumeric characters “No error”
Table 1: Parameter Types for Syntax Descriptions
Message Terminator and Message Separator
I. GPIB message terminators
In accordance with IEEE 488.2 standard, any of the following message
terminators are acceptable:
z LF ^ END Line feed code (hexadecimal 0A) with END
message
z LF Line feed code
z ^ END Last data byte with END message
These terminators are compatible with most application programs. A
semicolon separates one command from another when the commands
appear on the same line.
PST & PSS & PSH SERIES PROGRAMMABLE POWER SUPPLY
PROGRAMMER MANUAL
⎯ 12 ⎯
II. RS232 message terminators
As there is no signal of end message on RS232 bus, therefore, use LF
as message terminator. When a series of commands are sent to the
instrument, it must add a LF to be a judgment for message terminator.
As for query command, the return message of the instrument is also
added a LF for PC to judge message terminator.
Entering Commands
The standards that govern the command set for the programmable power
supply allow for a certain amount of flexibility when you enter
commands. For instance, you can abbreviate many commands or
combine commands into one message that you send to the programmable
power supply. This flexibility, called friendly listening, saves
programming time and makes the command set easier to remember and
use.
Command Characters
The programmable power supplies are not sensitive to the case of
command characters. You can enter commands in either uppercase or
lowercase.
You can execute any command with white space characters. You must,
however, use at least one space between the parameter and the command
header
Abbreviating Commands
Most commands have a long form and a short form. The listing for
each command in this section shows the abbreviations in uppercase.
For instance, you can enter the query :CHANnel1:VOLTage 1.23
simply as :CHAN1:VOLT 1.23