Specifications

7. Application Instructions

7-12

 Program Example

WDT

300ms program

END

150ms program

END

Watchdog timer reset

Dividing the program to

two parts so that both

parts' scan time are

less than 200 ms

Ϩʳ Program used when the setting of watchdog timer is 200ms and the

period of time from 0 to END (FEND) instruction is 300ms.

08 FOR

S Nested loop begins

Bit device Word device

Device

Operand

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

ϨϨϨϨϨϨϨϨϨϨϨ

09 NEXT

Nested loop ends

 FOR and NEXT instructions are used when “ n” nested loops are

needed.

 “ n” may be specified as 1 to 32767.

 When it is not desired to execute the FOR to NEXT instructions, use

the CJ command.

 Up to four levels of nested FOR loops are allowed.

 For example, loop A operates 3 times but within this loop there is

nested loop, B. For every completed cycle of loop A, the loop B will be

completed executed 4 times. Therefore, the numbers of loop B

operation will be 3 x 4=12 times (A x B).

FOR

 If there are too many loops, the processing time will be executed.

 Program Example

FOR

INC D0

Y10

D0MOV

MOV K0

X10