Mitsubishi Electric MELSEC iQ-R Series User Manual page 27

Section 3 NAME AND FUNCTION OF EACH PART
3.4.2 Measuring function for periodic electric energy
This function is to measure electric energy (consumption) for a certain period, and stores it into the buffer
memory. It can be used to measure electric energy for a certain tact or energy (standby power) when the facility
or equipment is not in operation.
(1) Overview
(a) It can measure two periodic electric energy at maximum (periodic electric energy 1, periodic electric
energy 2). Each of these can be measured independently.
(b) While the time when Periodic electric energy 1 measurement flag (Yn1)/ Periodic electric energy 2
measurement flag (Yn2) is ON, periodic electric energy can be measured.
(c) Since Periodic electric energy is stored in the nonvolatile memory, it can be retained even when a power
source reset.
(d) I/O signals and buffer memory corresponding to each of periodic electric energy 1 and 2 are shown
below.
Buffer memory
(Double words)
Periodic
electric energy
Un\G114,115
1
Periodic
electric energy
Un\G116,117
2
Supplement
Quantity survey of periodic electric energy is performed every measuring cycle. Therefore, if the
time for turning ON Periodic electric energy 1 measurement flag (Yn1) and Periodic electric energy
2 measurement flag (Yn2) is set to measuring cycle or less, measurement may not be performed.
For the measuring cycle, refer to "5.2.12".
Periodic
electric Periodic electric
energy energy data
measurement completion flag
flag
Yn1 Xn1
Yn2 Xn2
26
RE81WH
Periodic
Periodic electric
electric
energy reset
energy reset
completion flag
request
Yn3 Xn3
Yn4 Xn4