Fluke 9640A Series, Instruction Manual, Page: 126 / 324

9640A
Instruction Manual
4B-14
Device Initialization
The third level of initialization is on the device level. This means that it concerns only the
addressed instruments.
The *RST Command
Use this command to reset a device. It initializes the device-specific functions in the
Instrument.
The following happens when using the *RST command:
•
The instrument-specific functions are set to a known default state. The *RST
condition for each command is given in the command reference section.
•
The Instrument is set to an idle state (outputs are disabled), so that it can start new
operations.
The *CLS Command
Use this command to clear the status data structures. See ‘Status Reporting system’ in
this chapter.
The following happens when you use the *CLS command:
•
The instrument clears all event registers summarized in the status byte register.
•
It empties all queues, which are summarized in the status byte register, except the
output queue, which is summarized in the MAV bit.
Status Reporting System
Introduction
Status reporting is a method to let the controller know what the Instrument is doing. You
can ask the Instrument what status it is in whenever you want to know.
You can select some conditions in the Instrument that should be reported in the Status
Byte Register. You can also select if some bits in the Status Byte should generate a
Service Request (SRQ). See Figure 4B-12 for an overview of the Status Register
Structure.
(An SRQ is the instrument’s way to call the controller for help.)