Delta DVP-ES2 User Manual download pdf (Page 423)

100

101

3. Instruction Set

3-307

API Mnemonic Operands Function

124

D EXP P

Float exponent operation

Controllers

ES2/EX2 SS2 SA2

SX2

Bit Devices Word devices Program Steps Type

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

* * *

D *

DEXP, DEXPP: 9 steps

PULSE 16-bit 32-bit

ES2/EX2 SS2

SA2

SX2 ES2/EX2 SS2

SA2

SX2 ES2/EX2 SS2

SA2

SX2

Operands:

S: Exponent D: Operation result

Explanations:

1. The base is e = 2.71828 and exponent is S

2. EXP

[ S +1, S ] = [ D +1, D ]

3. Both positive and negative values are valid for S. Register D has to be 32-bit format. Operation

is conducted in floating point value, so the value in S needs to be converted into floating value

before exponent operation.

4. The content in D: e

, e =2.71828 and S is the specified exponent..

5. Flags: M1020 (Zero flag), M1021 (Borrow flag) and M1022 (Carry flag).

If absolute value of the result is larger than max. floating value, carry flag M1022 = ON.

If absolute value of the result is smaller than min. floating value, borrow flag M1021 = ON.

If the conversion result is 0, zero flag M1020 = ON.

Program Example:

1. When M0 = ON, convert (D1, D0) to binary floating value and save the result in (D11, D10).

2. When M1= ON, perform exponent operation with (D11, D10) as the exponent. The value is

saved in register (D21, D20) in binary floating format.

3. When M2 = ON, convert the value in (D21, D20) into decimal floating point value and save the

result in (D31, D30). (At this time, D31 indicates powers of 10 for D30)

RST M1081

DEXP D10 D20

DEBCD D20 D30

DFLT D0 D10

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Delta DVP-ES2 User Manual Page 423

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