17-8
IM DL850E-01EN
Math Source Waveforms (U1 to U3, I1 to I3)
The modules described in “Power analysis can be performed only when one of the following modules is
installed in a slot other than slot 7” under “Power Analysis (Power)” are applicable. CH13 or CH14 cannot be
selected.
Calculation Period (Calc Period)
Select the method that is used to determine the calculation period of power math values.
• Edge: Zero crossing rising edge of the selected signal
• Auto Timer: Specified time
• AC: Zero crossing rising edge of the selected AC signal
The DL850E/DL850EV determines the stopping of the signal selected for stop prediction and forces the
power value to zero. This is valid for analysis where the drive source signal is AC.
•
AC+DC: Zero crossing rising edge of the selected signal
After the DL850E/DL850EV performs stop prediction, the method is automatically switched to Auto
Timer
. This is valid for analysis where the driver source supplies AC power while it is in operation
and DC power while it is stopped.
If the Calculation Period Is Edge
•
Edge Detection Source (Edge Source)
Select the input channel of the signal that is used to determine the calculation period.
• Hysteresis (Hysteresis)
The same as the standard feature. For details, see “Trigger Hysteresis
” in chapter 4.
• Edge Source Filter (Edge Source Filter)
Select from the following.
OFF, 128 kHz, 64 kHz, 32 kHz, 16 kHz, 8 kHz, 4 kHz, 2 kHz, 1 kHz, 500 Hz, 250 Hz, 125 Hz, 62.5 Hz
The DL850E/DL850EV reduces the effects of noise by using hysteresis when it detects zero crossings.
If the synchronization source is distorted or harmonics and noise are superposed on the signal to a level
exceeding this hysteresis, harmonic components will cause zero crossing detection to occur frequently, and
the zero crossing of the fundamental frequency will not be detected stably
.
Consequently, the measured voltage and current may be unstable.
To stably detect zero crossings, set the synchronization source filter.
If the Calculation Period Is Auto Timer
Set the calculation period update time.
Range: 100 ns to 500 ms. Resolution: 100 ns.
If the Calculation Period Is AC
•
Edge Detection Source (Edge Source)
The options are the same as Edge.
• Hysteresis (Hysteresis) and Edge Source Filter (Edge Source Filter)
The options are the same as Edge.
• Stop Prediction (Stop Prediction)
Set the time from the point when the pulse input stops to the point when the DL850E/DL850EV determines
that the object has stopped.
• 2
, 4,
8, 16: Stop prediction is performed on the basis of the specified number of times the pulse period (four
settings) of the pulse one period before the pulse input stopped.
For details, see chapter 2.
17 Power Math
To Next Page
Loading...
Need help?
General
