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100

101

3. Instruction Set

3-61

API Mnemonic Operands Function

D ZCP P

Zone Compare

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

* ** * * * * * ***

S * * * * * * * * ***

D * * *

ZCP, ZCPP: 9 steps

DZCP, DZCPP: 17 steps

PULSE 16-bit 32-bit

ES2/EX2 SS2

SA2

SX2 ES2/EX2 SS2

SA2

SX2 ES2/EX2 SS2

SA2

SX2

Operands:

: Lower bound of zone comparison S

: Upper bound of zone comparison S: Comparison

value D: Comparison result

Explanations:

1. S is compared with its lower bound S

and upper bound S

. D stores the comparison results.

2. The comparison values are signed binary values. If b15=1 in 16-bit instruction or b31=1 in

32-bit instruction, the comparison will regard the value as a negative binary value.

3. Operand S

should be smaller than operand S

When S

> S

, the instruction takes S

as the

comparison value and performs normal comparison similar to CMP instruction.

4. If operand S

, S

, and S use index register F, only 16-bit instruction is available.

5. Operand D occupies 3 continuous devices. D, D +1, D +2 hold the comparison results,

D = ON if S

> S, D +1 = ON if S

≦ S ≦ S

, D +2 = ON if S

< S

Program example:

1. If D is set as M0, then M0, M1, M2 will work as the program example below.

2. When X0 = ON, ZCP instruction is driven and one of M0, M1, M2 is ON. When X0 = OFF,

ZCP instruction is not driven and M0, M1, M2 remain in the previous status.

ZCP

If C10 < K10, M0 = On

If K10 < C10 < K100, M1 = On

If C10 > K100, M2 = On

K10 C10 M0K100

3. Use RST or ZRST instruction to reset the comparison result.

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