![Fluke 525A User Manual Download Page 58](http://html.mh-extra.com/html/fluke/525a/525a_user-manual_2309641058.webp)
525A
Users Manual
4-16
Table 4-5. IEEE-488 Interface Messages (Received)
Mnemonic
Name
Function
ATN
Attention
A control line that, when asserted, notifies all instruments on the bus
that the next data bytes are an interface message. When ATN is
low, the next data bytes are interpreted as device-dependent or
common commands addressed to a specific instrument.
DAC
Data Accepted
Sets the handshake signal line NDAC low.
DAV
Data Valid
Asserts the handshake signal line DAV.
DCL
Device Clear
Clears the input/output buffers
END
End
A message that occurs when the Controller asserts the EOI signal
line before sending a byte.
GET
Group Execute
Trigger
Trigger a TC measurement and put the reading in the output buffer.
GTL
Go To Local
Transfer control of the 525A from one of the remote states to one of
the local states. (See Table 4-2)
LLO
Local Lockout
Transfers remote/local control of the 525A. (See Table 4-2)
IFC
Interface Clear
A control line that sets the interface to a quiescent state.
MLA
My Listen
Address
Addresses a specific device on the bus as a listener. The controller
sends MLA automatically whenever it directs a device-dependent or
common command to a specific instrument.
MTA
My Talk
Address
Addresses a specific device on the bus as a talker. The controller
sends MTA automatically whenever it directs a device-dependent or
common query to a specific instrument.
REN
Remote Enable
Transfer remote/local control of the 525A. (See Table 4-2.)
RFD
Ready For
Data
Sets the handshake signal line NRFD low.
SDC
Selected
Device Clear
Does the same thing as DCL, but only if the 525A is currently
addressed as a listener.
SPD
Serial Poll
Disable
Cancels the effect of a Serial Poll Enable.
SPE
Serial Poll
Enable
After the 525A receives this message, it sends the Status Byte the
next if is addressed as a listener, no matter what the command is.
UNL
Unlisten
“Unaddresses” a specific device on the bus as a listener. The
controller sends UNL automatically after the device has successfully
received a device-dependent or common command.
UNT
Untalk
“Unaddresses” a specific device on the bus as a listener. The
controller sends UNL automatically after the device has successfully
received a device-dependent or common query.
Summary of Contents for 525A
Page 8: ...525A Users Manual vi ...