594
FX3G/FX3U/FX3UC Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
21 Real Time Clock Control – FNC160 to FNC169
21.4 FNC163 – TSUB / RTC Data Subtraction
21.4 FNC163 – TSUB / RTC Data Subtraction
Outline
This instruction executes subtraction of two time data, and stores the subtraction result to word devices.
1. Instruction format
2. Set data
3. Applicable devices
S: This function is supported only in FX3U/FX3UC PLCs.
Explanation of function and operation
1. 16-bit operation (TSUB)
The time data (hour, minute, and second) stored in , +1, and +2 is subtracted from the time
data (hour, minute, and second) stored in , +1, and +2, and the subtraction result (hour,
minute, and second) is stored in , +1, and +2.
When the operation result is smaller than 0 hour, the borrow flag turns ON, and the value simply acquired by
subtraction added by 24 hours is stored as the operation result.
When the operation result becomes "0" (0:0:0), the zero flag turns ON.
Operand type Description Data type
Specifies "hour" of the time data (hour, minute, and second) used in subtraction.
(Three devices are occupied.)
16-bit binary
Specifies "hour" of the time data (hour, minute, and second) used in subtraction.
(Three devices are occupied.)
16-bit binary
Stores the subtraction result (hour, minute, and second) of two time data. (Three
devices are occupied.)
16-bit binary
Oper-
and
Type
Bit Devices Word Devices Others
System User Digit Specification System User
Special
Unit
Index
Con-
stant
Real
Number
Charac-
ter String
Pointer
XYMTCSD
.b KnX KnY KnM KnS T C D R
U\G
VZModifyKH E "
"P
3333 S 3
3333
S 3
3333
S 3
P
FNC 163
TSUB
−
−
Mnemonic Operation Condition
16-bit Instruction
7 steps
TSUB
TSUBP
Mnemonic Operation Condition
Continuous
Operation
Pulse (Single)
Operation
32-bit Instruction
S
1
S
1
S
2
D
S
1
S
1
S
2
S
2
D
S
2
S
2
S
2
S
1
S
1
S
1
D
D
D
Command
input
FNC163
TSUB
S
1
S
2
D
−
S
1
+1 (minute)
(hour)
+2 (second)
S
1
S
1
S
2
+1 (minute)
(hour)
+2 (second)
D
+1 (minute)
(hour)
+2 (second)
D
D
→
( , +1, +2)
−
( , +1, +2)
→
( , +1, +2)
S
1
S
1
S
1
S
2
S
2
S
2
D
D
D
S
2
S
2
The setting range of "hour" is from 0 to 23.
The setting range of "minute" is from 0 to 59.
The setting range of "second" is from 0 to 59.
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