The Srq Mask; Serial Poll Register - Fluke 8842A Instruction Manual

8842A
Instruction Manual
BIT: 8
0
DECIMAL
VALUE:
Bit
1
2
3
4
5
6
7
8
For example, the serial poll register reads 00010000 (binary) when data is available. This
value is read in binary by the controller, which might numerically reformat the value to
16 (decimal) or 10 (hexadecimal).
The serial poll register is cleared whenever the 8842A receives a new input command
string.

3-51. The SRQ Mask

The SRQ mask is a two-digit integer that specifies which conditions will generate a
service request. The SRQ mask is entered using the P1 command and can be read with
the G1 command. The conditions corresponding to each SRQ mask value are listed under
G1 in Table 3-1.
3-28
7 6
RQS ANY
ERROR AVAILIBLE
64 32
Name
Overrange An overrange condition occurs
Not used Never
Front panel SRQ Front panel SRQ button
pressed
Cal Step Complete Completion of store command
(C0)
Data Availible Output buffer loaded with any
data (Readings, Error
Messages. Get Responses)
Any Error An error condition occurs. At
the same time the output buffer
is loaded with an error
message. This sets bit 5.
RQS Any SRQ mask-enabled bit is
set.
Not used Never
Figure 3-8. Serial Poll Register
5 4
DATA CAL STEP
COMPLETE PANEL SRQ
16 8
Set
3 2
FRONT 0
4 2
Cleared
Device command received, or
Bus or Rear Panel Trigger, or
Output buffer is read
Always
Device command received
Device command received
Device command received, or
Bus or Rear Panel Trigger, or
Output buffer is read
Device command received, or
Output buffer is read
All SRQ mask-enabled bits are
cleared
Always
1
OVER-
RANGE
1