Fluke 6105A - Limited Access; Interconnections; Operation Via the IEEE 488 Interface; General

Remote Operation
Limited Access 5
5-7
5-6. Limited Access
The Instrument has three basic operating modes. Some of these modes only give limited
support for remote control:
• Manual Mode - Remote operation is available for all of manual mode, but for ease of
programming, some remote commands do not mirror front panel operations exactly.
• Calibration Mode - Remote operation is available.
• Test Mode - Remote operation is not available, but the full selftest can be initiated by a
SCPI command. The Instrument will give a straight Pass/ Fail response, but to
investigate further, it is necessary to re-run Test mode from the front panel.
5-7. Interconnections
Instruments fitted with an IEEE 488 interface communicate with each other through a
standard set of interconnecting cables, as specified in the IEEE 488.1 Standard document.
The IEEE 488 interface socket is fitted on the rear panel.
5-8. Operation via the IEEE 488 Interface
5-9. General
The power-up sequence is performed as in local operation. The Instrument can be
programmed to generate an SRQ at power-up.
5-10. Operating Conditions
When the Instrument is operating under the direction of the application program, there are
two main conditions, depending on whether the application program has set the “REN”
management line True or False:
1. REN True (REN line low).
The Instrument can be addressed and commanded if in either Manual or Calibration
mode. All access to front panel control will be removed, except for the bottom right soft
key, labeled Enable Local Usage. If LLO (Local Lockout) has been sent with REN
true, then the Enable Local Usage screen key will be inoperative. If LLO has not
been sent, the Enable Local Usage screen key will return to local control as if REN
were false (see 2 below).
The Instrument will act in response to valid commands, performing any changes in
output, etc. The display presentation will track the changes.
2. REN False (REN line high).
The Instrument will remain in Local Operation, but can be addressed and commanded,
while full access to front panel control is also retained.
The Instrument will act in response to the commands, performing any changes in output,
etc. No visible effect will be observed, other than the display presentation tracking the
changes.