1794-IB32模块备件

1794-IB32

温度R/W0
返回仪表安装位置的近似环境温度。默认单位
温度为华氏度（见MSV133）。该仪表补偿CVT电压和电流测量中的小漂移
（仪表假设CVT温度与仪表温度相似，请参阅安装说明）。
如果温度超出产品规格，设备状态LED将指示温度
相应的温度极限警告条件（请参阅安装说明）。
默认平滑值响应时间为30秒（参见AV134）。
AI312平滑● AI314小值● AI316大值● AI318平均值
AI380电源电压R/W0
返回提供给仪表低压电源的近似工作电压，单位为V。
报告的电压是整流和输入保护后的内部电压（通常为1.0–
比外部电源低2.0V）。
仪表需要至少12.0 VDC才能完全运行。如果测得的电压降到该值以下
根据阈值，电表预测功率损失，并节省配置和累积能量
到非易失性存储器。但是，如果功率损失不完整，仪表可能会继续运行
在降低的电源电压下操作。在这种状态下，如果仪表损坏，累积能量可能会损失
当（如果）发生全功率损耗时，其备用功率不足。设备状态LED将指示：
相应的低电源电压警告条件（请参阅安装说明）。
AI382平滑● AI384小值● AI386大值● AI388平均值
系统
AI410线路频率R/W0
返回基本交流线路频率𝒇, 以Hz为单位。如果没有连接CVT或所有CVT
CVT测量相位损耗条件（见AI1420），返回0 Hz。
设置了PowerPrint频率目标（请参见AV242），频率变化可能会设置频率漂移
条件（参见AV400）。如果是这样的话，可靠性也将在适当的情况下恢复到超出范围或低于范围。
默认平滑值响应时间为60秒（见AV142）。
AI412平滑● AI414小值● AI416大值● AI418平均值
AI420相位平均均方根电压R/W0
返回平均值𝑽 所有有效系统相位的RMS电压（见AI1420）。如果没有
对于有效相位，当前值返回0 V，可靠性返回适当的原因。
对于一般的平均计算，有效的系统阶段必须：
•包括在系统阶段选择中（见MSV161），
•CVT状态为无错误（见MSV1103），以及
•未检测到相位损失情况（见AI1420）。
默认平滑值响应时间为10秒（参见AV144）。
AI422平滑● AI424小值● AI426大值● AI428平均值
EM-RS485 BACnet协议指南18页共49页154-0022-0C
AI450相间平均RMS电压R/W0
返回平均值𝑽𝑷𝑷 有效系统之间的相间RMS电压（见AI1450）
相位（如AI420所定义）。如果正好有两个有效阶段，则平均值将崩溃为
他们之间只有一次阅读。如果有效相位少于两个，则当前值返回0 V和
可靠性返回一个适当的理由。
与单个相间电压测量一样，平均值仅在CVT时有效
共用一个公共中性点连接，且所有相位具有相同的频率（仪表没有）
检查任一条件）。
默认平滑值响应时间为10秒（参见AV144）。
AI452平滑● AI454小值● AI456大值● AI458平均值
AI520相位平均均方根电流R/W0
返回平均值𝑰 有效系统相位（如AI420所定义）的RMS电流（见AI1520）。
如果没有有效的相位，则当前值返回0 A，可靠性返回适当的原因。
默认平滑值响应时间为2秒（参见AV154）。
AI522平滑● AI524小值● AI526大值● AI528平均值
AI540相位平均电流角R/W0
返回平均值𝝋 有效系统相位的当前角度（见AI1540）。默认单位
是度（见MSV153），在-180和+180°之间归一化。
除了标准标准（由AI420定义）外，有效的系统阶段必须具有足够的可用性
提供稳定测量的负载功率（见AI1600，空载条件）。如果没有有效的
阶段，当前值返回0°，可靠性返回适当的原因。
总扫描接近180°或更大的角度平均值（见图7）是不确定的。
在这种情况下，当前值返回0°，可靠性返回不可靠的其他。
不确定的平均值通常表示CVT电压引线或电流传感器回路损坏
向后安装。如果是这样，负乘数（见AV1142、AV1152）可以恢复结果。
+反应性
-反应性
——真实的
+真实的
+反应性
-反应性
——真实的
+真实的
+反应性
-反应性
——真实的
+真实的
A： 扫掠=60°✔ B： 扫掠=135°✔ C： 扫掠=205°✘
图7：扫掠电流角
默认平滑值响应时间为2秒（参见AV154）。
AI542平滑● AI544小值● AI546大值● 平均值为548
EM-RS485 BACnet协议指南19页，共49页15

1794-IB32

1794-IB32

Temperature R/W0
Returns the approximate ambient temperature at the meter’s installed location. The default units
are °F (see MSV133). The meter compensates small drifts in CVT voltage and current measurements
(the meter assumes CVT temperature is similar to meter temperature, see Installation Instructions).
If the temperature is beyond the product specifications, the Device Status LED will indicate the
corresponding Temperature Limit warning condition (see Installation Instructions).
The default smoothed value response time is 30 seconds (see AV134).
AI312 Smoothed ● AI314 Minimum ● AI316 Maximum ● AI318 Average
AI380 Power Supply Voltage R/W0
Returns the approximate working voltage provided to the meter’s low voltage power supply, in V.
The voltage reported is an internal voltage after rectification and input protection (typically 1.0 –
2.0 V less than the external supply).
The meter requires 12.0 VDC minimum for full operation. If the measured voltage drops below this
threshold, the meter anticipates a power loss and saves the configuration and accumulated energy
to non-volatile memory. However, if the power loss proves incomplete, the meter may continue to
operate at the reduced supply voltage. In this state, accumulated energy may be lost if the meter
has insufficient reserve power when (if) full power loss occurs. The Device Status LED will indicate
the corresponding Low Supply Voltage warning condition (see Installation Instructions).
AI382 Smoothed ● AI384 Minimum ● AI386 Maximum ● AI388 Average
System
AI410 Line Frequency R/W0
Returns the fundamental AC line frequency 𝒇, in Hz. If there are no CVTs connected, or all of the
CVTs measure Phase Loss conditions (see AI1420), returns 0 Hz.
With a PowerPrint Frequency target set (see AV242), frequency variations may set the Frequency Drift
condition (see AV400). If so, Reliability will also return Over Range or Under Range, as appropriate.
The default smoothed value response time is 60 seconds (see AV142).
AI412 Smoothed ● AI414 Minimum ● AI416 Maximum ● AI418 Average
AI420 Phase Average RMS Voltage R/W0
Returns the average 𝑽 of the RMS Voltage (see AI1420) of all valid system phases. If there are no
valid phases, Present Value returns 0 V and Reliability returns an appropriate reason.
For average calculations in general, a valid system phase must:
• Be included in the System Phase Selection (see MSV161),
• Have a CVT Status of No Error (see MSV1103), and
• Not be detecting the Phase Loss condition (see AI1420).
The default smoothed value response time is 10 seconds (see AV144).
AI422 Smoothed ● AI424 Minimum ● AI426 Maximum ● AI428 Average
EM-RS485 BACnet Protocol Guide Page 18 of 49 154-0022-0C
AI450 Phase to Phase Average RMS Voltage R/W0
Returns the average 𝑽𝑷𝑷 of the Phase to Phase RMS Voltage (see AI1450) between valid system
phases (as defined by AI420). If there are exactly two valid phases, the average collapses to the
single reading between them. If there are less than two valid phases, Present Value returns 0 V and
Reliability returns an appropriate reason.
As with individual phase to phase voltages measurements, the average is valid only when CVTs
share a common neutral connection and all phases have the same frequency (the meter does not
check either condition).
The default smoothed value response time is 10 seconds (see AV144).
AI452 Smoothed ● AI454 Minimum ● AI456 Maximum ● AI458 Average
AI520 Phase Average RMS Current R/W0
Returns the average 𝑰 of the RMS Current (see AI1520) of valid system phases (as defined by AI420).
If there are no valid phases, Present Value returns 0 A and Reliability returns an appropriate reason.
The default smoothed value response time is 2 seconds (see AV154).
AI522 Smoothed ● AI524 Minimum ● AI526 Maximum ● AI528 Average
AI540 Phase Average Current Angle R/W0
Returns the average 𝝋 of the Current Angle (see AI1540) of valid system phases. The default units
are Degrees (see MSV153), normalized between –180 and +180°.
In addition to the standard criteria (as defined by AI420), valid system phases must have sufficient
load power to give a stable measurement (see AI1600, No Load condition). If there are no valid
phases, Present Value returns 0°, and Reliability returns an appropriate reason.
The average of angles with a total sweep approaching 180° or more (see Figure 7) is indeterminate.
In such cases, Present Value returns 0°, and Reliability returns Unreliable Other.
An indeterminate average often indicates that the CVT voltage leads or current sensor loop were
installed backwards. If so, a negative multiplier (see AV1142, AV1152) may restore the result.
+Reactive
–Reactive
–Real
+Real
+Reactive
–Reactive
–Real
+Real
+Reactive
–Reactive
–Real
+Real
A: Sweep = 60° ✔ B: Sweep = 135° ✔ C: Sweep = 205° ✘
Figure 7: Swept Current Angle
The default smoothed value response time is 2 seconds (see AV154).
AI542 Smoothed ● AI544 Minimum ● AI546 Maximum ● AI548 Average
EM-RS485 BACnet Protocol Guide Page 19 of 49 154-0022-0C
AI550 System Power Factor R/W0
Returns the true (apparent) power factor 𝒑𝒇� of the valid system phases (as defined by AI420).
Unlike an arithmetic average, the system power factor weights
the Real Power (see AI620) and Apparent Power (see AI660) of
each phase (see Figure 8). This definition keeps lightly loaded
phases with relatively poor power factor from introducing
excessive distortion in the result.
𝒑𝒇� = 𝑷𝑵𝑬𝑻
𝑺
If negative, the system export power exceeds the import power.
If the power in two phases flows in opposite directions, the real
components cancel, reducing the overall power factor.
The default smoothed value response time is 2 seconds (see AV164).
AI552 Smoothed ● AI554 Minimum ● AI556 Maximum ● AI558 Average
AI600 Total Real Power R/W0
Returns the absolute sum 𝚺𝑷 of the Real Power (see AI1600) of valid system phases (as defined by
AI420). The default units are kW (see MSV163).
The default smoothed value response time is 2 seconds (see AV164).
AI602 Smoothed ● AI604 Minimum ● AI606 Maximum ● AI608 Average
AI610 Phase Average Real Power R/W0
Returns the absolute average 𝑷 of the Real Power (see AI1600) of valid system phases (as defined by
AI420). The default units are kW (see MSV163).
The default smoothed value response time is 2 seconds (see AV164).
AI612 Smoothed ● AI614 Minimum ● AI616 Maximum ● AI618 Average
AI620 Net Real Power R/W0
Returns the signed sum 𝑷𝑵𝑬𝑻 of the Real Power (see AI1600) of valid system phases (as defined by
AI420). The default units are kW (see MSV163). Negative values indicate that overall export power
exceeds import power.
The default smoothed value response time is 2 seconds (see AV164).
AI622 Smoothed ● AI624 Minimum ● AI626 Maximum
AI628 Overall Average ● AI630 Import Average ● AI632 Export Average
AI640 Total Reactive Power R/W0
Returns the absolute sum 𝚺𝑸 of the Reactive Power (see AI1640) of valid system phases (as defined
by AI420). The default units are kVAR (see MSV163).
The default smoothed value response time is 2 seconds (see AV164)