Delta DVP-ES2/EX2/SS2/SA2/SX2/SE manual KnX KnY KnM KnS T For 3 steps

3. Instruction Set

API	Mnemonic	Operands	Function	Controllers
08	FOR		Start of a FOR-NEXT Loop	ES2/EX2	SS2	SA2	SX2
						SE

Type

Bit Devices

Word devices

Program Steps

OP

X

Y

M

S

K H KnX KnY KnM KnS T

C D

E

F

FOR: 3 steps

S

* *

*

*

*

*

* * * * *

PULSE

16-bit

32-bit

ES2/EX2

SS2

SA2

SX2

ES2/EX2

SS2

SA2

SX2

ES2/EX2

SS2

SA2

SX2

SE

SE

SE

Operands:

S: The number of times for the loop to be repeated.

API	Mnemonic	Function
09	NEXT	End of a FOR-NEXT Loop

Controllers

ES2/EX2	SS2	SA2	SX2
		SE

OP

Descriptions

Program Steps

N/A

No contact to drive the instruction is required.

NEXT: 1 step

PULSE

16-bit

32-bit

ES2/EX2

SS2

SA2

SX2

ES2/EX2

SS2

SA2

SX2

ES2/EX2

SS2

SA2

SX2

SE

SE

SE

Explanations:

1.FOR and NEXT instructions are used when loops are needed. No contact to drive the instruction is required.

2.“N” (number of times loop is repeated) may be within the range of K1 to K32767. If the range N≦K1, N is regarded as K1.

3.An error will occur in the following conditions:

•NEXT instruction is before FOR instruction.

•FOR instruction exists but NEXT instruction does not exist..

•There is a NEXT instruction after the FEND or END instruction.

•Number of FOR instructions differs from that of NEXT instructinos.

4.FOR~NEXT loops can be nested for maximum five levels. Be careful that if there are too many loops, the increased PLC scan time may cause timeout of watchdog timer and error. Users can use WDT instruction to modify this problem.

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