Delta-electronics Programmable Logic Controller DVP-PLC Manuel d'utilisateur télécharger pdf (Page 525)

100

101

9 Application Instructions API 150-199

DVP-PLC Application Manual

9-53

API Mnemonic Operands Function

173

D SUBR P

Floating Point Subtraction

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 *

DSUBR, DSUBRP: 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 minuend S

: Floating point subtrahend D: Remainder

Explanations:

1. S

and S

can be floating point values (FX.XX).

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 DSUBR 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 121 ESUB.

6. S

and S

can designate the same register. In this case, if the “continuous execution” type instruction is in use and

during the On period of the drive contact, the register will be subtracted once in every scan by a “pulse execution”

type instruction (DSUBRP).

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 minus F2.20000004768372 and the result F-1 will be

stored in the data registers (D10, D11).

DSUBR

F1.20000004768372

D10

F1.20000004768372 F2.20000004768372

Program Example 2:

When X0 = On, the floating point value (D1, D0) – floating point value (D3, D2) and the result will be stored in the

registers designated in (D11, D10).

DSUBR D0

D10

1 2 ... 520 521 522 523 524 525 526 527 528 529 530 ... 585 586

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Delta-electronics Programmable Logic Controller DVP-PLC Manuel d'utilisateur Page 525

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