Справочник Пользователя для Mitsubishi Electronics FX2NC

FX Series Programmable Controlers

Applied Instructions 5

5-138

5.14.4

TSUB (FNC 163)

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 subtracted from the time

value in S

, the result is stored to D as a new time

value.

Points to note:

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

seconds are kept within correct limits. Any underflow is correctly processed.

b) If the subtraction of the two times results in a value less than 00:00:00 hours, the value of

the result is the time remaining below 00:00:00 hours.

When this happens the borrow flag M8021 is set ON.

c) If the subtraction of the two times results in a value of zero (00:00:00 hours) 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 subtraction 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

TSUB
FNC 163
(Time
Subtrac-
tion)

Subtracts one
time value from
another to give a
new time

T, C, D

Note: 3 consecutive devices are used.

TSUB,
TSUBP:
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

Borrow M8021

D10

D20

D30

TSUB

X13

[ S1 ] [ S2 ]

[ D ]

D10: 10 hours

D11: 30 mins

D12: 27 secs