Mitsubishi Electric FX3G SERIES Programming Manual page 580

Programmable controllers

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Table of Contents

Series Programmable Controllers

Programming Manual - Basic & Applied Instruction Edition

1. Number of occupied devices

Seven devices are occupied by

Make sure that these devices are not used in other controls for the machine.

Program example

1. Example of setting the clock data (time)

In the program example shown below, the real time clock is set (to 15:20:30 on Tuesday, April 25, 2001).

• The shaded area indicates the set value of each item.

• When setting the time, it is recommended to set the time to several minutes ahead in advance, and then set X000

to ON when the accurate time is reached. The set time is then immediately written to the real time clock, and the

clock data is updated.

• Every time X001 is set to ON, the current time can be corrected by ±30 seconds.

• When handling the year in the 4-digit mode, add the following program.

D8018 will specify the 4-digit year mode in the second scan and later after the PLC mode is changed to RUN.

Initial pulse

- A PLC is normally operating in the 2-digit year mode. When the above instruction is executed and "K2000 (fixed

value)" is transferred to D8018 (year) in only one operation cycle after the PLC mode was changed to RUN, the

year mode is switched to the 4-digit mode.

- Execute this program every time the PLC mode is changed to RUN. Even if "K2000" is transferred, only the

display format is changed to the 4-digit year mode. The current date and time are not affected.

- In the 4-digit year mode, the set values "80 to 99" correspond to "1980 to 1999", and "00 to 79" correspond to

"2000 to 2079".

"80" indicates 1980. "99" indicates 1999. "00" indicates 2000. "79" indicates 2079.

• When the data access unit FX-10DU-E/20DU-E/25DU-E is connected, select the 2-digit year mode. If the 4-digit

year mode is selected, the year is not correctly displayed in the current version of the FX-10DU-E/20DU-E/25DU-E.

Note that the clock is changed to the 2-digit year mode when the clock is set from the FX-10DU-E/20DU-E/25DU-E

while the PLC is operating in the 4-digit year mode.

The current value of the built-in

real time clock is updated.

21 Real Time Clock Control – FNC160 to FNC169

Year (lower two digits)

The current value is

corrected by ±30 seconds.

21.8 FNC167 – TWR / Set RTC data

Fx3u series Fx3uc series