Delta-electronics Programmable Logic Controller DVP-PLC Instrukcja Użytkownika Pobierz pdf (Strona 426)

100

101

8 Application Instructions API 100-149

DVP-PLC Application Manual

8-24

API Mnemonic Operands Function

111

D EZCP P

Floating Point Zone Compare

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

* * *

S * * *

D * * *

DEZCP, DEZCPP: 17 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:

: Lower bound of binary floating point S

: Upper bound of binary floating point S: Binary floating point

comparison result D: Comparison result

Explanations:

1. D occupied 3 consecutive devices.

2. S

≤ S

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

3. S is compared with S

and S

and the result (>, =, <) is stored in D.

4. If S

or S

is andesignated constant K or H, the instruction will convert the constant into a binary floating point

value before the comparison.

5. When S

> S

, S

will be used as upper/lower bound for the comparison.

Program Example:

1. Designated device M0 and M0 ~ M2 are automatically occupied.

2. When X0 = On. DEZCP instruction will be executed and one of M0 ~ M2 will be On. When X0 = Off, EZCP

instruction will not be executed and M0 ~ M2 will remain their status before X0 = Off.

3. Use RST or ZRST instruction to clear the result.

DEZCP D0 D10 D20

On when (D1,D0) > (D21, D20)

On when (D1,D0) (D21, D20) (D11, D10)<<

On when (D21, D20) > (D11, D10)

Remarks:

For floating point operations, see “5.3 Handling of Numeric Values”.

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