Keithley 705 Instruction Manual page 45

Table 3-9. SRQ Commands and Conditions
End
of *
Settling Time
-~
Broken
SRQ Command Serial Loop
M34 X
M35 X
M36 X
M37 X
M38 X
M39 X
M40 X
M41 X
M42 X
M43 X
M44 X
M45 X
M46 X
M47 X
M48 X
M49 X
M50 X
M51 X
M52 X
M53
X
M54 X
M55 X
M56 X
M57 X
M58 X
M59 X
M60 X
M61 X
M62 X
M63 X
*Indicates conditions that generate an SRQ.
**MO disables SRQ.
X
X
X
X
X
X
X
X
X
X
X
X
X
X
NOTE
Upon power-up, the MO mode is selected. The
SRQ byte is cleared on a read of the serial poll
byte.
Programming Example-The bus response mode may be
programmed as follows:
REMOTE 717 (END LINE)
OUTPUT 717; "MIX" (END LINE)
The SRQ format is as follows:
Mnnn
where M = Bus Response Mode
n=O to 255 (base IO) in base 2 NNNNNNNN
SRQ MASK
Interval*
End of*
Time
Scan
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
x"
SRQ BYTE
MSB
LSB
1 7 1 6 151 4
1
3
I2 I' lo
'ND OF IEND OF IEND ITIMER I
N/A
DATA
- ---
ERROR
rimer*
Alarm
X
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
X
X
X
X
X
i SCAN1
IBR~~KEN INO I
I
0
-_ _
IDDCO 1 IDDC 1
I
I
I I I LOOP IMnTF I I I
SRQ Mask-In order to facilitate SRQ programming, the
Model 705 makes use of a mask when generating a SRQ.
When the appropriate bit in the mask is set, the instrument
generates a SRQ when those particular conditions exist. The
SRQ mask byte format is shown above. Bits within the mask
can be controlled by sending the ASCII character "M" follow-
ed by a decimal number from 0 to 63. Table 3-9 lists the condi-
LSB tions that cause a SRQ for each command parameter. Note
that the instrument can be programmed for one or more condi-
MSB
3-14