Fluke 5790A, Operator'S Manual

Page: 97 / 220

Remote Operation
IEEE-488 Interface Configuration
5
5-21
Byte indicates whether the queue is empty. The error queue is cleared when you turn off
the power, and when you use the *CLS (Clear Status) common command.
15 14 13 12 11 10 9 8
0 REMOTE RPTBUSY 0 0 0 0 0
7 6 5 4 3 2 1 0
0 0 MCCHG MDCHG INPCHG RNGCHG VALID
BUSY
REMOTE
RPTBUSY
MCCHG
MDCHG
INPCHG
RNGCHG
VALID
BUSY
Set to 1 when the 5790A is under remote control.
Set to 1 when a calibration report is being printed to the serial port.
Set to 1 when measurement controls have changed. Measurement controls are
EXTGUARD, EXTRIG, DFILT, AUTORANGE, HIRES.)
Set to 1 when an operating mode has changed. (Modes are MEASUREMENT,
CALIBRATION, DIAGNOSTIC, and CALWAITING.) This bit is always 0 in the ISR. It
changes to 1 only in the ISCR0 and ISCR1 registers.
Set to 1 when the input source has changed. This bit is always 0 in the ISR. It changes
to 1 only in the ISCR0 and ISCR1 registers.
Set to 1 when the range has changed. This bit is always 0 in the ISR. It changes to 1
only in the ISCR0 and ISCR1 registers.
Set to 1 when the present measurement is valid.
Set to 1 when the 5790A is a making a measurement, running a calibration or
diagnostics procedure, or saving anything to nonvolatile memory.
add50f.eps
Figure 5-4. Bit Assignments for the ISR, ISCEs and ISCRs
The error queue contains up to 16 entries. If many errors occur, only the first 15 errors
are kept in the queue. A 16th entry in the queue is always an "error queue overflow"
error, and all later errors are discarded until the queue is at least partially read. The first
errors are kept, because if many errors occur before the user can acknowledge and read
them, the earliest errors are the most likely to point to the problem. The later errors are
usually repetitions or consequences of the original problem.
5-41. IEEE-488 Interface Configuration
The 5790A IEEE-488 interface supports the IEEE-488 interface function subsets listed in
Table 5-5.