Keithley 6512, Instruction Manual

Page: 71 / 156

IEEE-488 Programming
3-16
3.2.13 Status (U)
Purpose To request status, error, and data conditions from the instrument.
Format
U0 Send status word
U1 Send instrument error conditions
U2 Send instrument data conditions
Description The status commands allow access to information concerning instrument operating modes that
are controlled by other device-dependent commands such as F (function) and R (range). Addi-
tional parameters of the status command allow data and error conditions to be accessed.
Status Word
When the command sequence U0X is transmitted, the instrument will transmit the status word
instead of its normal data string the next time it is addressed to talk. The status word will be
transmitted only once each time the U0 command is given. To make sure that correct status is
transmitted, the status word should be requested as soon as possible after the command is trans-
mitted.
The format of U0 status is shown in Figure 3-3. Note that the letters correspond to modes pro-
grammed by the respective device-dependent commands. The default values in the status word
(upon power up or after a DCL or SDC command) are also shown in Figure 3-3.