GE PQMII, Инструкция по эксплуатации

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CHAPTER 5: SETPOINTS
PQMII POWER QUALITY METER – INSTRUCTION MANUAL 5–21
this message. This value will be used to scale an analog output that is assigned to
display voltage as a percentage of nominal.
• NOMINAL SYSTEM FREQUENCY : Enter the nominal system frequency. The PQMII
measures frequency from the Van voltage and adjusts its internal sampling to best fit
the measured frequency. If the Van input is unavailable, the PQMII will assume the
frequency entered here.
5.3.2 Analog Outputs
PATH: SETPOINTS
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S2 SYSTEM SETUP
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ANALOG OUTPUT 1(4)
The PQMII has four (4) Analog Outputs configured through four setpoints pages. The
ANALOG OUTPUT RANGE
setpoint appears in the Analog Output 1 setpoints page only and
applies to all four outputs.
•
ANALOG OUTPUT RANGE : If the T20 option is installed, the Analog Outputs can be
configured to operate as 4 to 20 mA current sources or 0 to 20 mA current sources. All
four Analog Outputs will operate in the range defined by this setpoint.
• ANALOG OUTPUT 1(4) MAIN / ANALOG OUTPUT 1(4) ALT : If the PQMII is used in
conjunction with programmable controllers, automated equipment, or a chart
recorder, the analog outputs can be used for continuous monitoring. Although
parameters can be selected for continuous analog output, all values are available
digitally through the communications interface. Applications include using a
computer to automatically shed loads as the frequency decreases by monitoring
frequency or a chart recorder to plot the loading of a system in a particular process.
Each of the analog outputs can be assigned to two of the parameters listed in the
Analog Output Parameters table. The analog output main selection is the default
selection and a programmable switch input can be programmed to multiplex the
ANALOG OUTPUT 1(4) ALT
selection to the same output depending upon the open or closed
state of the switch input. See 5.3.4 Switch Inputs for details about configuring a switch
input. If no switch input is assigned as an analog output multiplexer, the analog output
main selection will be the only parameter which appears at the analog output
terminals. The ability to multiplex two different analog output quantities on one
„
ANALOG [
Z
]
OUTPUT 1
ANALOG OUTPUT RANGE:
4-20 mA
Range: 0-20 mA, 4-20 mA. Seen only in
the Analog Output 1 menu.
MESSAGE
ANALOG OUTPUT 1 MAIN:
Not Used
Range: refer to the Analog Output
Parameters table below
MESSAGE
MAIN 4 mA VALUE:
0
Range: refer to the Analog Output
Parameters table below
MESSAGE
MAIN 20 mA VALUE:
0
Range: refer to the Analog Output
Parameters table below
MESSAGE
ANALOG OUTPUT 1 ALT:
NOT USED
Range: refer to the Analog Output
Parameters table below
MESSAGE
ALT 4 mA VALUE:
0
Range: refer to the Analog Output
Parameters table below
MESSAGE
ALT 20 mA VALUE:
0
Range: refer to the Analog Output
Parameters table below