Syntax
TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis Service Manual
2–23
Entering Commands
The standards that govern the command set for the mainframe allows for a
certain amount of flexibility when you enter commands.
For example, you can abbreviate many commands or combine commands into
one message that you send to the mainframe. This flexibility, called “friendly
listening,” saves programming time and makes the command set easier to
remember and use.
The mainframe is not sensitive to the case of command characters. You can enter
commands in either upper or lower case.
You can precede any command with white space characters. White space
characters include a space or any combination of the ASCII control characters
hexadecimal 00 through 1F except for the character 0A (new line). You must,
however, use at least one space between the parameter and the command header.
Most commands have a long form and a short form. The listing for each
command in this section shows the abbreviations in upper case. For example,
you can enter the query
SYSTem:ERRor?
simply as
SYST:ERR?
(or
syst:err?
).
The brackets around a mnemonic indicate that the mainframe assumes this level
of the command header by default. It is not necessary, therefore, for this
mnemonic to appear as part of the header when you send the command. For
example, you can abbreviate the command
STATus:OPERational[:EVENt]?
to
STAT:OPER?
Because the mainframe assumes that a command at the beginning of a program
message starts from the root, you have the option of beginning the initial
command header with a colon (:).
You can combine (concatenate) commands and queries using a semicolon (;).
The mainframe executes concatenated commands in the order it receives them.
When you concatenate queries, the mainframe combines the responses into a
single response message.
For example: Querying both the standard event status register and the error/event
queue in the same program message.
STATus:OPERation?;:SYSTem:ERRor?
Command Characters
Abbreviating Commands
Combining Commands
Summary of Contents for TLA 720
Page 13: ...Table of Contents viii TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis Service Manual...
Page 22: ...Specifications...
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Page 38: ...Operating Information...
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Page 105: ...Command Groups 2 66 TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis Service Manual...
Page 111: ...TEST Subsystem 2 72 TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis Service Manual...
Page 124: ...Theory of Operation...
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Page 128: ...Maintenance...
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Page 155: ...Jumper Settings 4 26 TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis Service Manual...
Page 178: ...Options...
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Page 182: ...Diagrams...
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Page 186: ...Replaceable Mechanical Parts...
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Page 203: ...Replaceable Parts 7 16 TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis Service Manual...
Page 204: ...Index...
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Page 211: ...Index Index 6 TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis Service Manual...
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