Clock Function - Mitsubishi Electric melsec q00ujcpu User Manual

Programmable controller

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6.5 Clock Function

(1) Definition

This function reads the internal clock data of the CPU module by a sequence program and uses it for

time management

The clock data is used for time management required for some functions in the system, such as storing date into

the error history.

The Built-in Ethernet port QCPU can set the time in the CPU module automatically by using the time setting

function (SNTP client).

QnUCPU Userís Manual (Communication via Built-in Ethernet Port)

(2) Clock operation at power off and momentary power failure

Clock operation continues by the internal battery of the CPU module even when the programmable

controller is powered off or power failure occurs exceeding the allowable momentary power failure

(3) Clock data

shows the details of clock data, which is used internally in the CPU module.

Day of the week

Table6.4 Clock data details

Four digits (from 1980 to 2079)

1 to 31 (Automatic leap year detection)

0 to 23 (24 hours)

CHAPTER6 FUNCTIONS