Power Meter Remote Operation
Status Reporting
1-78
EPM-P Series Power Meters Programming Guide
Enable Register
The enable register specifies the bits in the event register that can
generate a summary bit. The instrument logically ANDs corresponding
bits in the event and enable registers and ORs all the resulting bits to
obtain a summary bit. Enable registers are read-write. Querying an
enable register does not affect it.
An Example Sequence
Figure 1-10 illustrates the response of a single bit position in a typical
status group for various settings. The changing state of the condition in
question is shown at the bottom of the figure. A small binary table shows
the state of the chosen bit in each status register at the selected times T1
to T5.
Figure 1-10: Typical Status Register Bit Changes
0
0
0
1
1
1 0
0
1
1
0
1
0 0
0
0
0
0
0
1
1
1
0
1
1
0
1
0
0
0
1
1 0
0
1
0
1
0
0
0
1
0
0
1
0
1
0
0
0
0
0
0
0 0
0
0 0
0
0 0
1
0
0
0
0
0
Case A
Case B
Case C
Case D
Condition
PT
R
NT
R
E
n
able
C
o
n
d
it
io
n
Ev
e
n
t
Su
m
m
ar
y
B
it
C
o
n
d
it
io
n
Ev
e
n
t
Su
m
m
ar
y
B
it
Co
n
d
it
io
n
Ev
e
n
t
Su
m
m
ar
y
B
it
C
o
n
d
it
io
n
Ev
e
n
t
S
u
mma
ry
B
it
Co
n
d
it
io
n
Ev
e
n
t
S
u
mma
ry
B
it
1
0
T1
T2
T3
T4
T5
0 0
0
0
0
0
*
*
*
*
marks when event register is read
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