Hitachi NJI-350B manual Control instructions-6, Code number To 49 Decimal, 106

FOR n (s)

Chapter 5 Instruction Specifications

Item number

Control instructions-6

Name

FOR

Ladder format

Condition code

Processing time (∝s)

Remark

R7F4

R7F3

R7F2

R7F1

R7F0

Average

Maximum

FOR n (s)

DER

ERR

SD

V

C

z

1]

z

z

z

Instruction format

Number of steps

33



Condition

Steps

FOR n (s)

3

Bit

Word

Double word

Constant

Usable I/O

X

Y

M

CU, CT

WX

WY

WM

TC

DX

DY

DM

Other

R,

TD, SS,

WR,

DR,

n

Code number

{

0 to 49 (Decimal)

s

Number of times repeated

{

{

Function

• Jumps from the NEXT n of the same code number to this instruction.

• If the number of times repeated (s) is greater than 0, the instruction following the FOR n (s) is executed.

• If the number of times repeated (s) is equal to 0, it jumps to the instruction following the NEXT n.

• Use FOR n (s) and NEXT n in pairs. Also, place the NEXT n after FOR n.

• The FOR n (s) may not be used more than once.

• Use the FOR n (s) and NEXT n in the same program area. (It is not allowed to include FOR n (s) in the normal scan and NEXT n in the subroutine area.)

• The FOR n (s) to NEXT n nesting can be made up to five levels.

Notes

• This instruction is checked prior to execution, and when there is an error, the following error code is set in the special internal output WRF001. Also, the CPU error code '34' is set to special internal output WRF000.

CPU error code	Special internal output	Error code	Error description
34	WRF001	H0001	Duplicate definition of FOR

• If an error is generated during the execution of the instruction, an error code will be set in the special internal outputs R7F3 and WRF015, and the following program will be executed.

Special internal output		Error code	Error description
		H0017	NEXT undefined
		H0043	FOR to NEXT error
R7F3=1	WRF015	H0044	Area error for NEXT
		H0045	FOR to NEXT nesting error
		H0046	FOR nesting overflow

Instruction for use

•For the instruction instruction, see NEXT n.

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