Mitsubishi Electric MELSEC iQ-R Series User Manual page 30

Section 3 NAME AND FUNCTION OF EACH PART
3.4.3 Max./min. value hold function
It memorizes the max./min. value for each measuring item, and retains them until the max./min. value clear
are performed.
(1) Max./min. value memory
It memorizes the max. and min. values, and the time of occurrence (year/month/day/hour/minute/second/day
of the week/millisecond) values for the following measuring item.
* The max. and min. values and the date of occurrence are stored in the nonvolatile memory, so that these
values can be retained even when a power source reset.
・Current demand
・Voltage
・Electric power demand
・Power factor
(2) How to clear the max. and min. values
You can use the I/O signal to clear the max. and min. values that specified by max./min. values clear target
(Un\G56).
The max. and min. values immediately after the clear becomes the present values and the date of
occurrence will be the present date and time.
The following describes how to clear the max. and min. values.
(a) Check that Max./min. values clear request (YnD) is OFF.
(b) Set the max./min. values clear target(Un\G56).
The setting range is shown below.
Setting value
11
12
13
14
19
Others
(c) Set Max./min. values clear request (YnD) to ON.
This module clears the max./min. values set by (b), and the date of occurrence, and set Max./min.
values clear completion flag (XnD) to ON.
(d) Check that Max./min. values clear completion flag (XnD) is ON, and then set Max./min. values clear
request (YnD) to OFF.
Max./min. values clear completion flag (XnD) will be turned OFF.
Max./min. values clear request (YnD)
Max./min. values clear completion flag (XnD)
Description
Current demand
Voltage
Electric power demand
Power factor
All of the above
Do not clear
Figure 3.4.3-1 Procedure for clearing max./min. value
ON
ON
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RE81WH
OFF
OFF