Yokogawa DAQWORX - Manual (Page 55)

4-8 IM WX102-01E
Selecting the Input Type for Linear Scaling
The input type can be selected from the following.
• VOLT (DC voltage)
• TC (thermocouple)
• RTD (resistance temperature detector)
• DI (contact)
• mA (DC current)
• AC (Power Monitor
• STRAIN
•
PULSE (For pulse, scaling setting is insufficient)
Setting Linear Scaling Values (SCL)
The left scaling and right scaling values are set following the left and right span values
of the span menu. The value on the left side of the SCL menu shows the left scaling
value, and the value on the right side of the SCL menu shows the right scaling value. The
setting ranges from -30000 to 30000.
• The decimal point can be set in any position of the scale as shown below. Set it when
the left scale is set.
“ .,” “.,” “.,” “.,” or “.”
• The default settings are 0.00 for the left span and 100.00 for the right span.
Setting the power monitor channel number
This procedure sets the channel number for which you want to show and record the
values of a parameter selected from the effective voltage, effective current, active power,
reactive power, apparent power, frequency, power factor and phase angle which were
calculated using the measured data. Therefore, it does not correlate with the terminals of
an input module.
Setting power monitor parameters
A power monitor module measures the voltage or current through the respective
channels. The values that are shown and saved are not those of the voltage and current
being actually measured through each channel but the values of the parameters you set
here.
A combination of parameters being measured is fixed for each group of channels 1-2, 3-4
and 5-6 within the same module. For example, setting channel 1 to P1 (active power 1)
sets channel 2 to VA1 (apparent power 1). In addition, the configurable parameters being
measured varies depending on the wiring method selected. See the lists on the next
page for more information. The respective mnemonics in the lists should be interpreted
as noted below:
Vi (i=1, 2, 3) : effective voltage Ii (i=1, 2, 3) : effective current
V13 : (V1+V3)/2 I13 : (I1+I3)/2
V0 : (V1+V2+V3)/3 I0 : (I1+I2+I3)/3
Pi (i=1, 2, 3) : active power Vari (i=1, 2, 3) : reactive power
P13 : P1+P3 Var13 : Var1+Var3
P0 : P1+P2+P3 Var 0 : Var1+Var2+Var3
VAi (i=1, 2, 3) : apparent power PFi (i=1, 2, 3) : power factor
VA13 : VA1+VA3 PF13 : P13/(PF13 2
+Var13
2
)
1/2 =P13/VA13
VA0 : VA1+VA2+VA3 PF0 : P0/(P0 2
+Var0
2
)
1/2 =P0/VA0
PHi (i=1, 2, 3) : phase FREQ : frequency
PH13 : tan
–1 (Var13/P13)
PH0 : tan
–1 (Var0/P0)
4.3 Setting Input Range, Span, and Linear Scaling