FANUC Series 0i-MODEL F Plus. CONNECTION MANUAL (FUNCTION) - page 116

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NOTE

Number 1 for /1 can be omitted. However, when two or more optional block skip
switches are used in one block, number 1 for /1 cannot be omitted.

(Example)

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

The following figures show the relationship between the timing, when optional block skip signals
(BDT1 to BDT9) are set to 1, and the ignored information:

When BDTn is set to 1 before the CNC starts reading a block containing /n, the block is
ignored.

BDTn

"1"

"0"

Reading by CNC

→

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

Ignored

Fig. 5.5 (a)

When BDTn is set to 1 while the CNC is reading a block containing /n, the block is not
ignored.

BDTn "1"

"0"

Reading by CNC

→

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

Not ignored

Fig. 5.5 (b)

When BDTn, currently set to 1, is set to 0 while the CNC is reading a block containing /n, the
block is ignored.

BDTn "1"

"0"

Reading by CNC

→

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

Ignored

Fig. 5.5 (c)

Two or more optional block skip switches can be specified in a block and the block is ignored
when BDTn corresponding to one of them is set to 1.

BDT3 "1"

"0"

Reading by CNC

→

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

Ignored

Fig. 5.5 (d)

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Note

NOTE

1 This function is ignored when programs are loaded into memory. Blocks

containing /n are also stored in memory, regardless of how the optional block skip
signal is set.

Programs stored in memory can be output, regardless of how the optional block
skip signals are set.

Optional block skip is effective even during sequence number search operation.

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 an optional block skip signal is 1. TH and TV checks are made for the
skipped portions in the same way as when the optional block skip switch is 0.

4 When bit 6 (BDA) of parameter No.11504 is 0 and the optional block skip is

invalid and /2 to /9 is specified, the specifying of optional block skip is ignored and
the block is executed. When bit 6 (BDA) of parameter No.11504 is 1 and the
optional block skip is invalid and /2 to /9 is specified, the alarm PS0004 "INVALID
BREAK POINT OF WORDS" is generated.

Signal

Optional block skip signals BDT1<Gn044.0>, BDT2 to BDT9<Gn045>

[Classification] Input signal

[Function] Select whether a block containing /n is to be executed or ignored.

[Operation] During automatic operation, a block containing /n in the program is ignored when the

corresponding optional block skip signal is set to 1. It is executed normally when the
signal is set to 0.

Optional block skip check signals MBDT1<Fn004.0>, MBDT2 to MBDT9<Fn005>

[Classification] Output signal

[Function] Notify the PMC of the states of the optional block skip signals BDT1 to BDT9. Nine

signals are provided, corresponding to the nine optional block skip signals. Signal
MBDTn corresponds to signal BDTn.

[Output cond.] Signal MBDTn is set to 1 in the following case:

When the corresponding optional block skip signal (BDTn) is set to 1

Signal MBDTn is set to 0 in the following case:
-

When the corresponding optional block skip signal (BDTn) is set to 0

Signal address

Gn044

BDT1

Gn045

BDT9

BDT8

BDT7

BDT6

BDT5

BDT4

BDT3

BDT2

Fn004

MBDT1

Fn005

MBDT9

MBDT8

MBDT7

MBDT6

MBDT5

MBDT4

MBDT3

MBDT2

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Parameter

Parameters which are used for this function are as follows.

11504

BDA

[Input type] Parameter input

[Data type] Bit

#6 BDA

When the optional block skip is disabled and /2 to /9 is specified:

Alarm is not generated.

Alarm PS0004 "INVALID BREAK POINT OF WORDS" is generated.

NOTE

1 This parameter is disabled to sequence number search operation.
2 This parameter is disabled to macro executor (conversational

macro, auxiliary macro).

Reference item

Manual name

Item name

OPERATOR’S MANUAL (B-64694EN)

Optional block skip/addition optional block skip

5.6

PROGRAM RESTART

Overview

When the tool is broken during automatic operation, or when a machining operation interrupted by a
holiday is to be restarted after the holiday, you can restart machining from a desired block by specifying
the sequence number of the block or the number of blocks from the beginning of the program to the block
where machining is to restart.
This function can also be used as a high-speed program check function.
There are two types of restarting methods as follows.
P type:

Restart after a tool is broken down

Q type:

Restart after the power is turned off (after a holiday, etc.) or after emergency stop is canceled

Explanation

Outputting M, S, T, and B (second auxiliary function) codes on the program
restart screen

By setting bit 7 (MOU) of parameter No. 7300, the M, S, T, and B (second auxiliary function) codes can
be output after a block where the program is to restart is searched for.
1

Before a movement to the machining restart point
<1> The last M, S, T, and B (2nd auxiliary function) codes can be output to the PMC automatically.

The last S code is output as the maximum spindle speed if the S code is specified together with
G92 in one block; otherwise, the S code is output as a specified spindle speed. On the program
restart screen, only the S code specified last is indicated regardless of whether it is specified
together with G92 in one block or not.

<2> All M codes sampled during the search for the block where the program is to restart and the last

S, T, and B (second auxiliary function) codes can be output to the PMC automatically.
Up to 35 M cods can be sampled. If there are more than 35 M codes to be sampled, the latest 35
M codes are output to the PMC.

<1> or <2> above can be selected by setting bit 6 (MOA) of parameter No. 7300.

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Until the machining restart point is reached (over store mode)
On the program restart screen, you can specify M, S, T, and B (second auxiliary function) codes
through MDI key input while maintaining the MEM mode or DNC mode.

Movement to the restart point

No.7310 sets the ordinal number of an axis along which a movement is made in dry run after program
restart. When No.7310 is not set, alarm SR5020 “PARAMETER OF RESTART ERROR” or the warning
“ORDINAL NUMBER ERROR (RESTART)” is displayed.

Presetting the relative coordinate values after the search

If bit 3 (RPR) of parameter No.7301 is 1, relative coordinate values are preset by absolute coordinate
values after the search in program restart.

Limitation

P type Restart

In the following conditions, P type restart cannot be performed:
-

Bit 7 (SQP) of parameter No. 13117 is set to 1.

Automatic operation has not been performed since power-on.

Automatic operation has not been performed since emergency stop was released.

Automatic operation has not been performed since the coordinate system was changed or shifted
(change of the external workpiece origin offset value).

The block that can be restored properly by P type program restart is a block for which coordinate system
setup or change was performed most recently before machining was interrupted.

Block number specification Restart

In the following conditions, the block number specification restart cannot be performed:
-

Bit 6 (SQB) of parameter No. 13117 is set to 1.

Specified block number could not be found. (Alarm PS0071 “DATA NOT FOUND” occurs.

Restart block

The block where the program is to restart is not necessarily be the block at which the program was
interrupted. You can restart the program from any block. For P-type restart, however, the block where the
program is to restart must use the same coordinate system as when program execution was interrupted.

Single block

When the single-block operation is enabled at the time of a movement to the restart point, a single-block
stop occurs each time an axis operation takes place. In this case, no MDI operation is allowed.

Manual intervention

During movement to the restart point, manual intervention is allowed for an axis for which a return
operation has not yet been performed. However, manual operations do not cause any movement along
axes for which a return operation has already been completed.

MDI

When the search operation has ended, no move command can be specified by MDI before axis
movement.

Reset

Do not perform a reset operation during the time from the start of the search operation of the restart
sequence until machining is restarted.
If a reset operation is performed, the restart steps must be performed again from the beginning.

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Feed hold

If a feed hold operation is performed during the search, the restart steps must be performed again from the
beginning.

Manual absolute

Every manual operation must be performed with the manual absolute mode turned on regardless of
whether the manual operation is performed before or after machining.

Reference position return

Unless an absolute position detector (absolute pulse coder) is provided, be sure to perform reference
position return after power-up, then perform restart operation.

Program restart signal

When program restart signal SRN <Gn006.0> is set to "1", pressing the cycle start does not cause a start.

Blocks specifying a macro statement, macro call, and subprogram call

Blocks specifying a macro statement, macro call, and subprogram call are not searched for even when
they have a sequence number. In such a case, search for a block previously preceding such a block.

Interruption type custom macro

During movement to the machining restart point at a dry run feedrate, no interruption type custom macro
can be started. If an interruption type custom macro is started, alarm DS0024 is issued.

Commands that prevent program restart

Program restart cannot be performed for blocks placed in the following modes:
-

Polar coordinate interpolation (G12.1)

Threading (G32, G33), Circular threading (G35, G36), Threading cycle (G92), Multiple repetitive
threading cycle (G76)

Polygon turning (G50.2)

Balance cutting (G68)

Rigid tapping

Spindle positioning

If any of the following commands is included between the beginning of a program and the block where
the program is to restart, program restart cannot be performed:
-

Workpiece coordinate system preset (G92.1, G50.3)

Commands for enabling and disabling synchronous/mixture control and superimposed control

Commands for enabling and disabling axis synchronous control

M, S, and T commands not usable in over store mode

The M, S, and T functions listed below, unlike the other M, S, and T functions, have special meanings
within the CNC. These M, S, and T commands cannot be specified from the over store screen. To specify
these commands, cancel the over store mode, and execute them in MDI operation.
Example:
-

Spindle positioning

Rigid tapping

Tool management

Tool offset for lathe system (T code)

Tool radius / Tool nose radius compensation

When bit 4 (INT) of parameter No. 13117 is set to 1, the interference check on Tool radius/tool nose
radius compensation can be disabled during search.

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Cs contour control

Usually, before a program restart operation can be started, it is necessary to enter Cs contour control
mode and establish the origin of the Cs contour controlled axis.
By using the Cs axis coordinate establishment function and setting bit 5 (CCS) of parameter No. 7300 to
1, however, it is no longer necessary to enter Cs contour control mode or establish the origin of the Cs
contour controlled axis before starting a program restart operation.
In this case, it is possible to change to Cs contour control mode, if necessary, after the end of the search
for the block subject to the restart.
If the system enters Cs contour control mode, the origin of the Cs contour controlled axis is established
with the Cs axis coordinate establishment function. And, the "DISTANCE TO GO" of the Cs contour
controlled axis is recalculated.

NOTE

To use Cs contour control axis coordinate establishment, perform reference
position return for the Cs contour control axis at least once after power on.
For details, refer to “Cs Contour Control Axis Coordinate Establishment” in this
manual.

Flexible synchronization control

Setting bit 0 (FRS) of parameter No. 13421 to 1 enables program restart in a program containing an M
code for turning the flexible synchronization mode on or off.
1.

Before starting program restart, set the flexible synchronization control mode selection signal MTA
<Gn197.0>, MTB <Gn197.1>, MTC <Gn197.2>, or MTD <Gn197.3> to set the synchronization
mode specified in the program command in the block where the program is to restart (the state
specified by an M code for turning the flexible synchronization mode on or off).

If the signal setting is inconsistent with the state specified by the M code, alarm PS5374 occurs. The
synchronization mode is assumed to be off in the program from the beginning of the program until
the first M code for turning the flexible synchronization mode on or off is specified.

The flexible synchronization mode cannot be changed during the execution of program restart (when
signal SRNMV <Fn002.4> is set to "1"). If an attempt is made to change the mode, alarm PS5375
occurs.

When a block in the flexible synchronization mode is specified as the restart block, 0 is displayed for
DISTANCE TO GO for the slave axis. In addition, “********” is displayed as the restart position
for the slave axis.

To restart a program from a block after the flexible synchronization mode is canceled, an absolute
command must be specified for the slave axis after the mode is canceled. If no absolute command is
specified for the slave axis, alarm PS5378 occurs.

3-dimensional coordinate system conversion / Tilted working plane command

When the block where the program is to restart is in 3-dimensional coordinate system conversion mode
G68 (machining center system) or G68.1 (lathe system) or Tilted working plane command, bit 1 (3DD) of
parameter No. 7301 can be set to select whether to move the tool to the restart position along each axis
according to the program coordinate system or workpiece coordinate system. When the bit (3DD) is set to
0, the tool moves to the restart position along each axis according to the program coordinate system;
when it is set to 1, the tool moves according to the workpiece coordinate system.
The “DESTINATION” and “DISTANCE TO GO” values are displayed according to the setting of this bit
(3DD).
The "ABSOLUTE" values are displayed according to the setting of bit 6 (DAK) of parameter No. 3106.

Setting to prevent movement to restart position

When there are two or more axes which has the same setting value in parameter No.7310, the movement
to the restart position is not executed in the second or more axis.

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Signal

Program restart signal SRN<Gn006.0>

[Classification] Input signal

[Function] Selects program restart.

[Operation] When the program restart signal is set to "1" to search for the sequence number of the

block to be restarted, the screen changes to the program restart screen. When the program
restart signal is set to "0", and automatic operation is activated, the tool is moved back to
the machining restart point at dry run speed along the axes one by one in the sequence
specified in parameter No. 7310. When the tool is set to the restart point, machining
restarts.

Program restart under way signal SRNMV<Fn002.4>

[Classification] Output signal

[Function] Indicates the program is being restarted.

[Output cond.] The program restart under way signal becomes "1" when:

The program restart signal is set to "0" after the screen changes to the program
restart screen.

The signal is set to "0" when:
-

The program restart sequence ends (the tool has been moved to the restart point on
all controlled axes).

Signal address

Gn006

SRN

Fn002

SRNMV

Parameter

7300

MOU

MOA

CCS

[Input type] Parameter input

[Data type] Bit path

#5 CCS

When the Cs contour control axis is used in the spindle mode or when the origin of the Cs

contour control axis is not established, program restart is:

Disabled.

Enabled.

#6 MOA

In program restart operation, before movement to a machining restart point:

The last M, S, T, and B codes are output.

All M codes and the last S, T, and B codes are output.

This parameter is enabled when the bit 7 (MOU) of parameter No.7300 is set to 1.

#7 MOU

In program restart operation, before movement to a machining restart point after restart

block search:
0:

The M, S, T, and B codes are not output.

The last M, S, T, and B codes are output.

7301

RPR

3DD

ROF

[Input type] Parameter input

[Data type] Bit path

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#0 ROF

When the coordinates for restarting are displayed on the program restart screen:

Tool length compensation (M series), tool position compensation (T series), cutter
compensation (M series), and tool-nose radius compensation (T series) are
considered.

Whether these compensation values are considered depends on the settings of bit 6
(DAL) of parameter No. 3104, bit 7 (DAC) of parameter No. 3104, and bit 1 (DAP)
of parameter No. 3129 (parameters for specifying whether to consider each
compensation value).

#1 3DD

In program restart operation, when the restart block is in 3-dimensional coordinate

conversion mode G68 (machining center system) or G68.1 (lathe system), the tool moves
to the restart point along each axis:
0:

According to the program coordinate system in dry run.

According to the workpiece coordinate system in dry run.

The restart coordinates and restart travel distance are also displayed in the coordinate
system set in this parameter.

NOTE

The change made to this parameter in program restart operation is
ignored.

#3 RPR

When the search is completed in program restart or quick program restart, relative

coordinate values are:
0:

Not preset.

Preset by absolute coordinate values.

NOTE

This parameter is invalid in direct jump method of quick program
restart.

7310

Ordinal number of an axis along which a movement is made in dry run after program restart

[Input type] Setting input

[Data type] Byte axis

[Valid data range] 1 to (Number of controlled axes)

This parameter sets the ordinal number of an axis along which a movement is made in dry
run after the program is restarted.

WARNING

1 When there is two or more axes which has the same setting value in

this parameter, the movement to the restart point is not executed in
the second or more axis.

2 When the quick program restart is effective and bit 6 (SAV) of

parameter No.11250 is set to 1, the movement to the restart point is
not done in the axis which this parameter is set negative value(-1 to
-(Number of controlled axes)).

NOTE

When this parameter is 0, alarm SR5020, "PARAMETER OF
RESTART ERROR" or the warning "ORDINAL NUMBER ERROR
(RESTART)" is displayed.

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