Hitachi NJI-350B manual 109

Chapter 5 Instruction Specifications

Item number

Control instructions-8

Name

Call subroutine

Ladder format

Condition code

Processing time (∝s)

Remark

R7F4

R7F3

R7F2

R7F1

R7F0

Average

Maximum

CAL n

DER

ERR

SD

V

C

z

1]

z

z

z

Instruction format

Number of steps

24



Condition

Steps

CAL n

2

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 99 (Decimal)

Function

• If the startup condition of CAL n is on, this instructions executes the subroutine program (the program sandwiched by SB n and RTS) of the same code number.

• If the startup condition is off, the next program is executed.

• Up to 5 levels of CAL (nesting) for another subroutine can be performed within a subroutine.

• It is possible to call a subroutine from within an interrupt scan program.

Notes

• 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
R7F3=1	WRF015	H0013	SB undefined
		H0041	Nesting error

CAL n

Instruction for use

R000

CAL n

Other program

END

SB n

Subroutine program

R000 turns	R000 turns
ON	OFF

•When R000 is on, a subroutine program is executed by CAL n. After the execution, the program is re-executed from the code following the CAL n.

•When R000 is off, the subroutine program is not executed, and the next program is executed.

RTS

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