Mitsubishi Electric FX3G SERIES Programming Manual page 573

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
Cautions
1) Number of occupied devices
Three devices are occupied by
Make sure that these devices are not used in other controls for the machine.
2) When utilizing the time (hour, minute, and second) of the built-in PLC real time clock
Read the values of special data registers using the TRD (FNC166) instruction, and then specify those word
devices as the operands.
Program example
X000
FNC163
TSUB
D 10 10 (hour)
D 11 30 (minute)
D 12 10 (second)
10:30:10
When the operation result is smaller than "00:00:00"
S
1
5 (hour)
20 (minute)
40 (second)
5:20:40
,
S S
1 2
S S D
1 2
D 10 D 20 D 30
D 20 3 (hour)
− →
D 21 10 (minute)
D 22 5 (second)
3:10:5
S
2
18 (hour)
− →
10 (minute)
5 (second)
18:10:5
21 Real Time Clock Control – FNC160 to FNC169
21.4 FNC163 – TSUB / RTC Data Subtraction
and respectively.
D
( D10, D11, D12) − (D20, D21, D22)
→ ( D30, D31, D32)
D 30 7 (hour)
D 31 20 (minute)
D 32 5 (second)
7:20:5
D
←
5 − 18= − 13 (<0)
11 (hour)
10 (minute)
35 (second)
11:10:35
21
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