SECTION 4
IEEE-488 Reference
4.2.19 u -
Status
Purpose
Format
Parameters
Description
Use to obtain instrument status and configuration.
Un
UO Send machine status word
Ul Send error status word
U2 Send model number and
firmware revision
U3 Send calibration value
U4 Send trigger interval
U5 Send trigger delay
U6 Send relative value for current
U7 Send relative value for V/I ohms
U8 Send voltage source value (Model 487)
U9 Send voltage source error status word (Model 487)
By sending the appropriate U command and then addressing the instrument to talk, you can
obtain information on machine status, error conditions, and other data. The tioxmation is
transmitted only once for each U command.
UO Machine Status Word
When the command sequence UOX is transmitted, the instrument will transmit the status word
instead of its normal data string the next time it is addressed to tak
The format of UO status is shown in Figure 4-6. Note that the letters correspond to modes pro-
grammed by the respective device-dependent commands. The factory default values are also
shown in Figure 4-6.
4-32
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