Delta-electronics Programmable Logic Controller DVP-PLC Manual do Utilizador descarregar pdf (Página 529)

100

101

9 Application Instructions API 150-199

DVP-PLC Application Manual

9-57

API Mnemonic Operands Function

175

D DIVR P

Floating Point Division

Controllers

ES/EX/SS SA/SX/SC EH/SV

Bit Devices Word Devices Program Steps Type

X Y M S K H KnX KnY KnM KnS T C D E F

D *

DDIVR, DDIVRP: 13 steps

PULSE 16-bit 32-bit

ES EX SS SA SX SC EH SV ES EX SS SA SX SC EH SV ES EX SS SA SX SC EH SV

Operands:

: Floating point dividend S

: Floating point divisor D: Quotient

Explanations:

1. S

and S

can be floating point values.

2. See the specifications of each model for their range of use.

3. Flags: M1020 (zero flag), M1021 (borrow flag), M1022 (carry flag)

4. In DDIVR instruction, floating point values (e.g. F1.2) can be entered directly into S

and S

or stored in register D

for operation. When the instruction is being executed, operand D will store the operation result.

5. When S

and S

stores the floating point values in register D, their functions are the same as API 123 EDIV.

6. If S

is “0”, the program will regard it as an operation error and the instruction will not be executed. M1067 and

M1068 will be On and D1067 will record the error code H’0E19.

7. If the absolute value of the operation result is larger than the maximum floating point displayable, the carry flag

M1022 will be On.

8. If the absolute value of the operation result is smaller than the minimum floating point displayable, the borrow flag

M1021 will be On.

9. If the operation result is “0”, the zero flag M1020 will be On.

Program Example 1:

When X0 = On, the floating point F1.20000004768372 will be divided by F2.20000004768372 and the result

F0.545454561710358 will be stored in the data registers (D10, D11).

DDIVR F1.20000004768372 D10F1.20000004768372 F2.20000004768372

Program Example 2:

When X1 = On, the floating point value (D1, D0) ÷ floating point value (D11, D10) and the quotient will be stored in the

registers designated in (D21, D20).

DDIVR D0 D10 D20

1 2 ... 524 525 526 527 528 529 530 531 532 533 534 ... 585 586

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