Measuring Function For Periodic Electric Energy - Mitsubishi Electric MELSEC-Q QE81WH4W User Manual

4 Functions

4.2.2 Measuring function for periodic electric energy

This function is to measure electric energy 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
1) It can measure two periodic electric energy (periodic electric energy 1, periodic electric
energy 2). Each of these can be measured independently.
2) During 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.
3) Periodic electric energy is stored in the nonvolatile memory, so that it can be retained even
at a power source reset.
4) I/O signals and buffer memory corresponding to each periodic electric energy 1 and 2 are
provided below.
Periodic electric
energy 1
Periodic electric
energy 2
Note
Measurement of periodic electric energy is performed every measuring cycle (250
ms). Therefore, if the time to turn ON Periodic electric energy 1 measurement
flag (Yn1) and Periodic electric energy 2 measurement flag (Yn2) is set to 250
ms or less, measurement may not be taken.
Periodic
Buffer memory electric energy
measurement
(Double words)
flag
Un\G114, 115 Yn1
Un\G116, 117 Yn2
Periodic
electric energy
data
completion
flag
Xn1
Xn2
4 - 7
QE81WH4W
Periodic
Periodic electric energy
electric energy
reset request completion
Yn3
Yn4
reset
flag
Xn3
Xn4