Bus Response Hlodc - Keithley 705 Instruction Manual

last byte of its data transfer sequence. In this way, the last byte
is properly identified allowing variable length data words to be
transmitted. The Model 705 normally sends EOI during the last
byte of its data string or status word. The EOI response of the
instrument may be set with one of the following commands:
1. KO-Send EOI during last byte
2. Kl -Send no EOI
NOTE
Upon power-up the KO mode is enabled.
Programming Example-The EOI response is suppressed
with the following HP-85 statement sequence:
REMOTE 717 (END LINE)
OUTPUT 717; "KIX" (END LINE)
3.5.5 Bus Response Mode (SRQ)
The bus response mode determines whether or not the Model
705 requests service from the controller through the SRQ line.
When the appropriate mode is selected, the instrument
generates a SRQ under the data or error conditions described
as follows:
1. If the instrument receives an illegal device-dependent com-
mand (IDDC) or illegal device-dependent command option
(IDDCO), or if the instrument is not in remote when pro-
grammed.
2. If the end of the buffer is encountered when running a pro-
gram.
3. At the end of interval time.
4. Execution of time alarm.
5. End of settling time.
6. Broken Serial loop.
Upon power-up, or after a DCL or SDC, SRQ is disabled. The
bus response made may be programmed as follows:
.I. MO-No SRQ
2. Ml through 63-Send SRQ
Refer to Table 3-9 for conditions that generate a SRQ.
Table 3-9. SRQ Commands and Conditions
iRQ Command
MO**
Ml
M2
M3
M4
M5
M6
M7
M8
M9
Ml0
Ml1
Ml2
Ml3
Ml4
Ml5
Ml6
Ml7
Ml8
Ml9
M20
M21
M22
M23
M24
M25
M26
M27
M28
M29
M30
M31
M32
M33
Broken
Serial Loop
X
X
End of *
Settling Time
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Interval*
Time
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
End of*
Scan
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Timer*
Alarm
X
X
X
X
X
X
X
X
X
X
X
X
;
X
X
X
IDDC, IDDCO, *
No Remote
X
X
X
X
X
X
X
X
X
X
3-13