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FX Series Programmable Controlers

Applied Instructions 5

5-137

5.14.3

TADD (FNC 162)

Contents:

Each of S

, S

and D specify the head address of 3

data devices to be used a time value.
The time value in S

is added to the time value in

, the result is stored to D as a new time value.

Points to note:

a) The addition is performed according to standard time values. Hours, minutes and seconds

are kept within correct limits. Any overflow is correctly processed.

b) If the addition of the two times results in a value greater than 24 hours, the value of the

result is the time remaining above 24 hours.

When this happens the carry flag M8022 is set ON.

c) If the addition of the two times results in a value of zero (0:00:00: 0 hours, 0 minutes, 0

seconds) then the zero flag M8020 is set ON.

d) The same device may be used as a source (S1 or S2) and destination device. In this case

the addition is continually executed; the destination value changing each program scan. To
prevent this from happening, use the pulse modifier or an interlock program.

Mnemonic

Function

Operands

Program steps

TADD
FNC 162
(Time
Addition)

Adds two time
values together to
give a new time

T, C, D

Note: 3 consecutive devices are used to represent
hours, minutes and seconds respectively.

TADD,
TADDP:
7 steps

0(S)

FX FX

(2C)

2N(C)

(2C)

2N(C)

0(s)

PULSE-P

(2C)

2N(C)

0(s)

16 BIT OPERATION

0(s)

(2C)

2N(C)

32 BIT OPERATION

FLAGS

Zero M8020

Carry M8022

D10

D20

D30

TSUB

X13

[ S1 ] [ S2 ]

[ D ]

D10: 10 hours

D11: 30 mins

D12: 27 secs