Delta DVP-ES2 User Manual download pdf (Page 173)

100

101

3. Instruction Set

3-57

API Mnemonic Operands Function

FOR

Start of a FOR-NEXT Loop

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 * * * * * * * * ***

FOR: 3 steps

PULSE 16-bit 32-bit

ES2/EX2 SS2

SA2

SX2 ES2/EX2 SS2

SA2

SX2 ES2/EX2 SS2

SA2

SX2

Operands:

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

API Mnemonic Function

NEXT End of a FOR-NEXT Loop

Controllers

ES2/EX2 SS2

SA2

SX2

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

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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Delta DVP-ES2 User Manual Page 173

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