Mitsubishi Electric MELSEC iQ-R Series User Manual page 38

Section 3 NAME AND FUNCTION OF EACH PART
(2) The waveform data is stored into the buffer memory per sampling period.
The waveform data is stored into the buffer memory per sampling period (μs) of the waveform data.
This method is used for acquiring the waveform data synchronized with sampling period.
Refer to "4.2.1(6)" for synchronizing method.
(a) Measured items
Measured items
Continuous waveform
data of voltage
current
*1: When setting single phase 2-wire system for phase wire system, no measuring is performed.
(b) Number of waveform data
The number of each waveform data to be stored into buffer memory at once is one.
(c) Restrictions for waveform data
・It is impossible to obtain waveform data immediately after applying power to programmable controller
system. (Module ready OFF state)
Obtain waveform data after confirming "Module ready ON state".
・It is impossible to obtain waveform data immediately after setting operating condition of this device.
Obtain waveform data after confirming "operating condition setting completed flag" is ON.
・It is possible to occur communication error inside the RE81WH due to disturbance noise (parallel noise
to CT line). When a communication error is occurred (when a communication error flag indicates error),
waveform data during the period of measured data acquisition clock is not stored into the buffer memory.
(In this case, the last waveform data is stored into the buffer memory)
Details
waveform data of 1-2 line voltage
and
waveform data of 2-3 line voltage
waveform data of 1-phase current
waveform data of 3-phase current
*1
*1
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RE81WH