13-7
IM 760401-01E
Communication Commands 1 (System of Commands before the IEEE 488.2-1987 Standard)
13
Query MT?<terminator>
Example MT0
Description Average active power (MT13, 14, 15, 16) is
displayed only during integration.
OA/OA? Sets D/A output items/inquires about the
current settings.
Up to 4 or 12 measured data can be
selected and output as analog signal
from the D/A converter.
Syntax OA m1,m2,m3 <terminator>
“m1” indicates D/A output channel,
and must be set within the
following range.
1 ≤ m1 ≤ 12 or 4
“m2” indicates output item no.
m2= 0: No output
1: Voltage (V)
2: Current (A)
3: Power (W)
4: Reactive power (var)
5: Apparent power (VA)
6: Power factor (PF)
7: Input voltage frequency (V
Hz)
8: Input current frequency (A
Hz)
9: Watt-hour (Wh)
10: Ampere-hour (Ah)
11: Phase angle (deg)
12: Peak voltage value (Vpk)
13: Peak current value (Apk)
14: Computation result (MATH)
24: Positive watt-hour (Wh+)
25: Negative watt-hour (Wh–)
26: Positive ampere-hour (Ah+)
27: Negative ampere-hour (Ah–)
“m3” indicates element.
m= 1: Element 1
2: Element 2 (for WT230 model
760503 only)
3: Element 3 (for WT230 only)
4: ∑ (for WT230 only)
Query OA1? <terminator>
Example OA1,3,2
Description • Parameter error 12 will occur if any of “m1”,
“m2” and “m3” is set to an illegal value.
• If computation result is selected and the
MATH computing equation is set to anything
other than efficiency (MT0) or the average
active power (MT13 to 16) when integration is
in progress, the D/A output is fixed to 0 (V).
• “No output” and “computation result” have no
relation to the element, but when using them
with the “OA” command, set m3=1.
OAD/OAD? Initializes D/A output items/inquires
about the current settings. Two sets of
default settings are available: one is for
normal measurement and the other is
for integration. The same initialization
can also be performed using a key
operation.
Syntax OAD m <terminator>
“m” indicates default no.
m= 2: Select mode
0: Default for normal
measurement
1: Default for integration
Query OAD? <terminator>
Example OAD1
Description • Parameter error 12 will occur if “m” is set to
an illegal value.
• Select mode (OAD2) is validated when the
OA command is executed if “m” has been set
to “0” (default for normal measurement) or “1”
(default for integration).
OD Requests output of measurement data.
Syntax OD <terminator>
OE Requests output of error codes via
communications.
Syntax OE <terminator>
Example ERR11 <terminator>
Error code Description
11 Command error
12 Parameter error
13 Attempted to change
settings which cannot be
changed while integration
was in progress.
14 Attempted to set auto
range mode while external
sensor range was selected.
15 Attempted to execute a
command that was protected.
16 Attempted to execute a
command that was protected
while harmonic measurement
was being performed.
17 Time-out in print output.
18 Not in printing mode, or
no data available.
19 Attempted to execute
commands while recalling/
storing is in progress.
30 File data failure
31 File is damaged.
32 Not stored in internal
memory.
33 No data to be stored in
internal memory.
41 Attempted to start
integration when integration
had been stopped due to an
irregularity.
42 Attempt made to start
integration during
integration.
13.1 Commands
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