Mitsubishi Electric MELSEC FX3U Programming Manual page 917

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
2. Method by program
1) Method using TWR (FNC167) instruction dedicated to time setting.
2) Method using M8015 and D8013 to D8019.
When not using TWR (FNC167) instruction dedicated to time setting, the following program can be used
for time setting.
X000
M 0
X001
Point
a) While M8015 is OFF, the registers for date and time cannot be changed.
Make sure to set M8015 to ON, and then input date and time.
b) When inputting the time, set the time several minutes ahead of the current time.
When the actual time reaches the set time, set M8015 to OFF from ON to make the new time valid
and to begin the real time clock again.
c) If values indicating infeasible date and time are input (Example: February 30, 2006), the time cannot
be set. Input the correct date and time.
3. Method by programming tool
1) Starting the time change
Set M8015 to ON by forced ON/OFF.
2) By using the data register value change function in the device monitor of the programming tool, input the
date and time (several minutes ahead) to each data register.
3) Finishing the time change
When the actual time reaches the input data, reset M8015 by forced ON/OFF.
Point
a) While M8015 is OFF, the registers for date and time cannot be changed.
Make sure to set M8015 to ON, and then input date and time.
b) When inputting the time, set the time several minutes ahead of the current time.
When the actual time reaches the set time, set M8015 to OFF from ON to make the new time valid
and to begin the real time clock again.
c) If values indicating infeasible date and time are input (Example: February 30, 2006), the time cannot
be set. Input the correct date and time.
M8015
PLF M 0
FNC 12
Second data
K 30 D8013
MOV
FNC 12
D8014
Minute data
K 20
MOV
FNC 12
Hour data
K 10 D8015
MOV
FNC 12
Day data
K 25 D8016
MOV
FNC 12
Month data
K 4 D8017
MOV
FNC 12
Year data
K 0 D8018
MOV
FNC 12
Day-of-the-week data
K 2 D8019
MOV
M8017 +/- 30 seconds correction
37 Operation of Special Devices (M8000 -, D8000 -)
37.2 Supplement of Special Devices (M8000 - and D8000 -)
→ For details, refer to Section 21.8.
indicates a set item.
Example:
10:20:30 on April 25 Tuesday in 2000
Set the time 2 to 3 minutes ahead of the actual
time, write the program on the left to the PLC,
and turn RUN X000 ON.
When the actual time reaches the input set time,
turn the input switch X000 OFF to set the time
and start the clock operation.
±30 seconds correction
Every time X001 is set from OFF to ON, the
second data of the clock is corrected. (When the
second data is from 0 to 29, it is set to 0. When
the second data is from 30 to 59, it is set to 0
and the minute data is incremented by "1".)
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A
B
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