Keithley 2601B Reference Manual page 290

Series 2600B System SourceMeter® Instrument Reference Manual
Do not use top-level command names as variable names. If you do, you will lose access to all
commands that start with that name until the global variables are restored. For example, if you send
the command digio = 5, you lose access to the digio.* commands. To restore the commands listed
in the table (except node) and access to the digio.* commands, send the restoreglobals
command or restart the instrument. The top-level command names are listed in the following table.
Top level command names
beeper
bit
collectgarbage
dataqueue
delay
digio
display
errorqueue
eventlog
exit
format
fs
Values and variable types
In Lua, you use variables to store values in the run-time environment for later use.
Lua is a dynamically-typed language; the type of the variable is determined by the value that is
assigned to the variable.
Variables in Lua are assumed to be global unless they are explicitly declared to be local. A global
variable is accessible by all commands. Global variables do not exist until they have been assigned a
value.
2600BS-901-01 Rev. B / May 2013
gcinfo os
gettimezone print
gpib printbuffer
io printnumber
lan reset
localnode savebuffer
makegetter script
makesetter serial
math settime
meminfo settimezone
node setup
opc smua
Section 6: Instrument programming
smub
status
string
timer
tonumber
tostring
trigger
tsplink
tspnet
type
userstring
waitcomplete
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