Delta Electronics AH500, Руководство пользователя

Страница: 218 / 547

C h a p t e r 5 A p p l i e d I n s t r u c t i o n s
API Instruction code Operand Function
172 D ADDR P S
1
, S
2
, D Floating-point addition
Device X Y M S K 16# F KnM KnS D W T C V Z
S
1

 
S
2

 
D
 
Pulse instruction 16-bit instruction 32-bit instruction (9 steps)

–

E xp la nat io n

S
1
and S
2
can be floating-point values.

S
1
: Augend; S
2
: Addend; D : Sum

S
1
and S
2
can be floating-point values, or data registers in which
floating-point values are stored.

If S
1
and S
2
are data registers in which floating-point values are stored,
the function of API 172 DAADR is the same as the function of API 120
DEADD.

The floating-point value in S
2
is added to the floating-point value in S
1
,
and the sum is stored in D .

S
1
and S
2
can be the same register. If the instruction DAADR is used
under the circumstances, the value in the register is added to itself
whenever the conditional contact is ON in a scan cycle. Generally, the
pulse instruction DADDRP is used.

If the absolute value of an oepration result is greater than the maximum
floating-point value available, a carry flag will be ON.

If the absolute value of an oepration reuslt is less than the minimum
floating-point value available, a borrow flag will be ON.

If an operation result is 0, a zero flag will be ON.

SM1064 is the zero flag in an Ox motion subroutine, and SM968 is the
zero flag in O100.

SM1065 is the borrow flag in an Ox motion subroutine, and SM969 is the
borrow flag in O100.

SM1066 is the carry flag in an Ox motion subroutine, and SM970 is the
carry flag in O100.
E xamp le 1

When X0.0 is ON, the floating-point value F1.0 is added to the
floating-point value F1.23456, and the sum F2.23456 is stored in (D11,
D10).
X0.0
D AD DR F 1.23456
D 10
F 1.0
E xamp le 2

When X0.0 is ON, the floating-point value in (D3, D2) is added to the
floating-point value in (D1, D0), and the sum is stored in (D11, D10).
X0.0
DADDR D0 D2 D10
5 - 1 0 3