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FANUC Series 30i/300i/300is-MODEL A. Machining Center System. User's manual - page 48

13.PROGRAM CONFIGURATION

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Function

Address

Input in mm

Input in inch

Increment system IS-A

0 to 999999.99 sec

Increment system IS-B

0 to 99999.999 sec

Increment system IS-C

0 to 9999.9999 sec

Increment system IS-D

0 to 999.99999 sec

Dwell

Increment system IS-E

X,
U (T series
only)

0 to 99.999999 sec

Dwell P

1 to 99999999

Designation of a program number

1 to 99999999

Number of subprogram repetitions

0 to 9999

*1 In ISO code, the colon ( : ) can also be used as the address of a

program number.

*2 When address I, J, K, or R is used to specify the radius for

circular interpolation, the specifiable range is as follows:

Increment system

Input in mm

Input in inch

IS-A

999999999.99 mm

99999999.999 inch

IS-B

999999999.999 mm

99999999.9999 inch

IS-C

99999999.9999 mm

9999999.99999 inch

IS-D

9999999.99999 mm

999999.999999 inch

IS-E

999999.999999 mm

99999.9999999 inch

*3 For inch input/millimeter machines, the maximum specifiable

range of dimension words is as follows:

Increment system

Maximum specifiable range

IS-A

39370.078 inch

IS-B

39370.0787 inch

IS-C

3937.00787 inch

IS-D

393.700787 inch

IS-E

39.3700787 inch

*4 The maximum value of addresses M, S, T, and B is 99999999.

Note that, however, values longer than the permissible number of
digits set in parameter No. 3030 to 3033 cannot be specified. The
values and uses for some codes are limited by parameter setting.
(For example, some M codes are not buffered.) For details, refer
to the parameter manual.

- Optional block skip

When a slash followed by a number (/n (n=1 to 9)) is specified at the
head of a block, and optional block skip signals BDT1 to BDT9 are
set to 1 during automatic operation, the information (/n to the end of
the block (EOB)) contained in the block for which /n corresponding to
signal BDTn is specified is ignored.

Example 1)

/2 N123 X100.0 Y200.0 ;

Example 2)

//3 N123 X100.0 Y200.0 ;

→

Incorrect

/1 /3 N123 X100.0 Y200.0 ;

→

Correct

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Input signal and program code

Input signal

Start code to be ignored

BDT1

/ or /1

(NOTE)

BDT2 /2
BDT3 /3
BDT4 /4
BDT5 /5
BDT6 /6
BDT7 /7
BDT8 /8
BDT9 /9

NOTE

1 Number 1 for /1 can be omitted. However, when

two or more optional block skips are specified for
one block, number 1 for /1 cannot be omitted.

2 Depending on the machine tool, all optional block

skip signals (1 to 9) may not be usable. Refer to
manuals of the machine tool builder to find which
switches are usable.

The following shows the relationship between the timing at which
optional block skip signals BDT1 to BDT9 are set to 1 and the range
of information to be ignored.

1. When the signal BDTn is set to 1 before the CNC starts reading a

block that contains /n, the block is ignored.

BDTn

"1"

"0"

Read by CNC

→

. . . ; /n N123 X100. Y200. ;N234 . . . .

This range of information is ignored.

2. When the signal BDTn is set to 1 while the CNC is reading a

block that contains /n, the block is not ignored.

BDTn "1"

"0"

Read by CNC

→

. . . ; /n N123 X100. Y200. ; N234 . . . .

This range of information is not ignored.

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3. When the signal BDTn is set to 0 while the CNC is reading a

block that contains /n, the block is ignored.

BDTn "1"

"0"

Read by CNC

→

. . . ; /n N123 X100. Y200.; N234 . . . .

This range of information is ignored.

4. Two or more optional block skips can be specified in one block.

When the signal corresponding to any of the specified skips is set
to 1, the block is ignored.

BDT3 "1"

"0"

Read by CNC

→

. . . ; /1 /3 /5 N123 X100. Y200. ; N234 . . . .

This range of information is ignored.

NOTE

1 This function is not used when a program is

registered in memory. A block containing / is
registered in memory regardless of the statuses of
optional block skip signals. When a program in
memory is also output regardless of the statuses of
optional block skip signals.

In addition, the optional block skip function is
enabled during a search for a sequence number.

2 Position of a slash

A slash (/) must be specified at the head of a block.
If a slash is placed elsewhere, the information from
the slash to immediately before the EOB code is
ignored.

3 TV and TH check

When the optional block skip signal is set to 1, TH
and TV checks are made for the skipped portions
in the same way as when the optional block skip
signal is set to 0.

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- Program end

The end of a program is indicated by programming one of the
following codes at the end of the program:

Table 13.2 (d) Code of a program end

Code Meaning

usage

M02
M03

For main program

M99 For

subprogram

If one of the program end codes is executed in program execution, the
CNC terminates the execution of the program, and the reset state is set.
When the subprogram end code is executed, control returns to the
program that called the subprogram.

CAUTION

A block containing an optional block skip code such
as /M02 ; , /M30 ; , or /M99 ; is not regarded as the
end of a program. (see "Optional block skip".)

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13.3

SUBPROGRAM (M98, M99)

If a program contains a fixed sequence or frequently repeated pattern,
such a sequence or pattern can be stored as a subprogram in memory
to simplify the program.
A subprogram can be called from the main program.
A called subprogram can also call another subprogram.

Format
- Subprogram configuration

One subprogram

Subprogram number or subprogram file name (or
the colon (:) optionally in the case of ISO)
Program end

M99 need not constitute a separate block as indicated below.

Example) X100.0Y100.0M99;

- Subprogram call

When a subprogram with a 4-digit or shorter
program number is called

M98 Pxxxx xxxx ;

Subprogram number
Number of times the subprogram is called repeatedly

M98 Pxxxx Lxxxxxxxx ;

Number of times the subprogram is called repeatedly

Subprogram number

When a subprogram with a 5-digit or longer
program number is called

M98 Pxxxxxxxx Lxxxxxxxx ;

Subprogram number
Number of times the subprogram is called repeatedly

When a subprogram is called by file name

M98 <xxxx> Lxxxxxxxx ;

Subprogram file name
Number of times the subprogram is called repeatedly

Oxxxx ;
:
M99;

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- Called program and folders to be searched

The order in which folders are searched depends on the method of
calling a subprogram. Folders are searched in sequence and the
program found first is called. For details, see the "Managing
Programs" chapter.

NOTE

1 When calling a subprogram of a 4-digit or shorter

subprogram number repeatedly (P8 digit), make
the subprogram number 4 digits by prefixing it with
“0” if the subprogram number is shorter than 4
digits.
Example)
P100100: Call subprogram No. 100 ten times.
P50001: Call subprogram No. 1 five times.

2 If the number of times the subprogram is called

repeatedly is omitted when a subprogram with a
4-digit or shorter program number is called, the
subprogram is called just once.
In this case, it is not necessary to adjust the
subprogram number length to 4 digits as described
in Item 1 above.

3 When calling a subprogram of a 4-digit or shorter

program number repeatedly (P8 digit), do not
specify address L in the same block.

4 When calling a subprogram with a 5-digit or longer

program number, do not omit the specification of
the number of repeats.

5 When calling a subprogram by file name, be sure

to specify the file name immediately after M98.

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Explanation

When the main program calls a subprogram, it is regarded as a
one-level subprogram call. Thus, subprogram calls can be nested up to
ten levels as shown below.

O0001 ;

M98P0010 ;

M30 ;

Main program

O0090 ;

M99 ;

O0010 ;

M98P0020 ;

M99 ;

O0020 ;

M98P0030 ;

M99 ;

Subprogram

(One-level
nesting)

(Two-level
nesting)

(Nine-level
nesting)

Subprogram

O0100 ;

M99 ;

(Ten-level
nesting)

Subprogram

M98P0100 ;

A single call command can repeatedly call a subprogram up to
99999999 times. For compatibility with automatic programming
systems, in the first block, Nxxxxxxxx can be used instead of a
subprogram number that follows O (or :). A sequence number after N
is registered as a subprogram number.

NOTE

1 The M98 and M99 code signal and strobe signal

are not output to the machine tool.

2 If the subprogram number specified by address P

cannot be found, an alarm PS0078 is output.

3 When an attempt is made to call a subprogram by

file name, but the specified file cannot be found,
alarm PS0310 is issued.

Example

- M98 P51002 ;

- X1000.0 M98 P1200 ;

- Execution sequence of subprograms called from a main program

A subprogram can call another subprogram in the same way as a main
program calls a subprogram.

This command specifies "Call the subprogram (number 1002) five times in
succession." A subprogram call command (M98P_) can be specified in the
same block as a move command.

This example calls the subprogram (number 1200) after an X movement.

1 2 3

Main program

N0010 . . . ;
N0020 . . . ;
N0030 M98 P21010 ;
N0040 . . . ;
N0050 M98 P1010 ;
N0060 . . . ;

Subprogram

O1010 . . . ;
N1020 . . . ;
N1030 . . . ;
N1040 . . . ;
N1050 . . . ;
N1060 . . . M99 ;

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Special usage
- Specifying the sequence number for the return destination in the main program

If P is used to specify a sequence number when a subprogram is
terminated, control does not return to the block after the calling block,
but returns to the block with the sequence number specified by P.
Note, however, that P is ignored if the main program is operating in a
mode other than memory operation mode.
This method consumes a much longer time than the normal return
method to return to the main program.

Subprogram

O0010 . . . ;

N1020 . . . ;

N1030 . . . ;

N1040 . . . ;

N1050 . . . ;

N1060 . . . M99 P0060 ;

Main program

N0010 . . . ;

N0020 . . . ;

N0030 M98 P1010 ;

N0040 . . . ;

N0050 . . . ;

N0060 . . . ;

- Using M99 in the main program

If M99 is executed in a main program, control returns to the start of
the main program. For example, M99 can be executed by placing
/M99 ; at an appropriate location of the main program and setting the
optional block skip function to off when executing the main program.
When M99 is executed, control returns to the start of the main
program, then execution is repeated starting at the head of the main
program.
Execution is repeated while the optional block skip function is set to
off.
If the optional block skip function is set to on, the /M99 ; block is
skipped ; control is passed to the next block for continued execution.
If/M99Pn ; is specified, control returns not to the start of the main
program, but to sequence number n. In this case, a longer time is
required to return to sequence number n.

N0010 . . . ;

N0020 . . . ;

N0030 . . . ;

N0040 . . . ;

N0050 . . . ;

N0060 . . . M99 P0030 ;

N0070 . . . ;

N0080 M02 ;

Optional block skip
ON

Optional block skip
OFF

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