Generating Special Waveforms (Waveform bank)

You can generate peak-clipped sine waveforms. This is valid in AC mode and AC+DC mode.

You can use remote control to configure user-defined waveforms. For details, see the Communication Interface Manual on the included CD-R.

The PCR-LE2 Series creates reference waveforms for output voltage by performing D/A conversion on the data that is stored in its internal memory. One cycle (phase angle of 360°) consists of 10 horizontal bits and 14 vertical bits.

The reference voltage waveform of the PCR-LE2 Series is a sine wave. A sine wave whose positive peak is 8191 and negative peak is -8191 is assigned.

 

• Waveform bank

The stored waveform data in memory that corresponds to one waveform is referred to as a waveform bank. The PCR-LE2 Series has 64 waveform banks. Each bank is assigned a number from 0 to 63, which is used to select the waveform. Waveform bank 0 contains a sine wave that is used as the PCR-LE2 Series’ reference voltage waveform. This waveform bank cannot be overwritten. In the factory default settings, all waveform banks have the same waveform (sine wave) as the one that is stored in waveform bank 0.

• Crest factor

The crest factor is the ratio of the AC waveform’s peak value to its rms value.

Crest factor = peak value/rms value.

For a sine wave, the crest factor is 1.41. In the voltage waveforms of commercial power lines, the peaks are clipped, so the crest factor is between 1.2 and 1.4.

These settings cannot be made if you are using the synchronization function.

When you turn the power off, the waveform banks from number 24 to number 63 are set to the factory default setting (a sine wave). Save these waveform banks to a USB memory device as necessary before you turn the power off.

During single-phase, three-wire output and three-phase output (optional), the same waveform is assigned to all phases.

Press OTHERS (SHIFT+MEMORY), WAVE (F2), and then EDIT (F5) to select the waveform (sine wave or peak clipped).

 

Item		Title	Description	Valid modes
EDIT	WB No.	Edit WB No.	Specifies the waveform bank number that you want to set	AC and AC+DC
	SIN	Edit WB No.	Selects the sine wave
	P.C	Edit WB No.	Sets the crest factor of a peak-clipped waveform (1.10 to 1.40)

Generating special waveforms

You can generate special waveforms while output is on or off.

When you have selected the regulation adjustment or soft sensing compensation function, you cannot change the number of the waveform bank that you want to execute.

Press OTHERS (SHIFT+MEMORY), WAVE (F2), and then WB No. (F1) to select the number of the waveform bank that you want to execute.

 

Item	Title	Description	Valid modes
WB No.	WB No.	Specifies the number of the waveform bank that you want to execute	AC and AC+DC

If the output is on, the selected waveform will be generated. If the output is off, press OUTPUT to turn the output on and generate the selected waveform.

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