FANUC Series 30i/300i/300is-MODEL A. Machining Center System. User's manual - page 144

3.MANUAL OPERATION

OPERATION

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3.13

AUXILIARY FUNCTION OUTPUT BLOCK REVERSE
MOVEMENT FOR MANUAL HANDLE RETRACE

Overview

This function enables reverse movement during manual handle retrace
even if a move command and an auxiliary function (M/S/T/B code)
are specified in the same block.
This is an optional function.

Explanation

Reverse movement is enabled for an auxiliary function output block if
all the conditions and sequences described below are met.

<1> The function is effective when bit 0 (ADC) of parameter No.

6401 (auxiliary function output block reverse movement enable
parameter) is set to

<2> The function is effective when a move command and an auxiliary

function (M/S/T/B code) are specified in the same block.

<3> If the rotation of the manual pulse generator is reversed when all

the conditions mentioned in <1> and <2> are met, the NC sets
auxiliary function output block reverse movement enable output
signal ADCO<Fn091.5> to "1".

<4> When auxiliary function output block reverse movement enable

output signal ADCO<Fn091.5> is set to "1", the PMC performs
the corresponding operation with a ladder language program.
After that, set finish signal FIN<Gn004.3> to "1". This enables
the NC to move the axis in reverse direction (move it backward
or move it forward again).

<5> When finish signal FIN<Gn004.3> is set to "1", the NC sets

ADCO<Fn091.5> to "0" and starts to move the axis in reverse
direction (move it backward or move it forward again).
As for parameter-grouped M codes or S or T codes, those of the
previous one block are output. As for M codes that are not
grouped by parameter or B codes, the same codes as for the
forward movement are also output for the reverse movement.

The figure below presents a timing chart depicting this process. The
chart shows an example of M codes.
This example describes how an auxiliary function is executed after
waiting for the move command to complete (distribution end signal
DEN) following the reverse movement.
It is also possible to execute an auxiliary function without waiting for
the move command to complete after the reverse movement.

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M command

Mxxx

Move command

Code signals

M00 to M31

Strobe signal

Operation on PMC side

Reverse movement enable output signal ADCO

Finish signal

FIN

Distribution end signal DEN

<3>

<4>

<5>

Notes

NOTE

1 When a single auxiliary function is specified

individually, carry out the regular auxiliary function
completion sequence. Reverse movement
becomes possible after moving to the next (or
previous) block.

2 If a move command and an auxiliary function are

specified in the same block and if no travel
distance remains after movement, carry out the
regular auxiliary function completion sequence.
Reverse movement becomes possible after moving
to the next (or previous) block.

3 To enable reverse movement using this function

when an M code other than grouped M codes and
a move command are specified in the same block,
set bit 5 (RVN) of parameter No. 6400 to "0".

4 This function is not supported for M02 or M30.
5 If an auxiliary function is specified in a block having

no move command, such as G70, carry out the
regular auxiliary function completion sequence.
Reverse movement becomes possible after moving
to the next (or previous) block.

6 This function is optional.

4.AUTOMATIC OPERATION

OPERATION

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AUTOMATIC OPERATION

Programmed operation of a CNC machine tool is referred to as
automatic operation.
This chapter explains the following types of automatic operation:
4.1 MEMORY

OPERATION.......................................................1111

Operation by executing a program registered in CNC memory

4.2 MDI

OPERATION.................................................................1114

Operation by executing a program entered from the MDI panel

4.3 DNC

OPERATION ................................................................1118

Function for executing a program while reading the program
from an input device connected to the reader/puncher interface or
a memory card.

4.4 SCHEDULE

OPERATION....................................................1121

Function for executing a program while reading the program
from an input device connected to the reader/puncher interface or
a memory card according to a schedule.

4.5 EXTERNAL SUBPROGRAM CALL (M198) ......................1124

Function for calling and executing subprograms (files) registered
in an external input/output device during memory operation

4.6 MANUAL HANDLE INTERRUPTION ...............................1127

Function for performing manual feed during movement executed
by automatic operation

4.7 MIRROR

IMAGE ..................................................................1134

Function for enabling mirror-image movement along an axis
during automatic operation

4.8 PROGRAM

RESTART..........................................................1136

Restarting a program for automatic operation from an
intermediate point

4.9 TOOL RETRACT AND RECOVER .....................................1149

Function for retracting the tool to a desired position

4.10 RETRACE ..............................................................................1161

Function for executing a program in the reverse direction.

4.11 ACTIVE BLOCK CANCEL ..................................................1172

Function for stopping operation and canceling the remaining
movement by inputting a signal during automatic operation.

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4.AUTOMATIC OPERATION

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4.1

MEMORY OPERATION

Programs are registered in memory in advance. When one of these
programs is selected and the cycle start switch on the machine
operator's panel is pressed, automatic operation starts, and the cycle
start LED goes on.
When the feed hold switch on the machine operator's panel is pressed
during automatic operation, automatic operation is stopped
temporarily. When the cycle start switch is pressed again, automatic
operation is restarted.
When the

key on the MDI panel is pressed, automatic

operation terminates and the reset state is entered.
For the multi-path control, the programs for the multiple paths can be
executed simultaneously so the multiple paths can operate
independently at the same time.
The following procedure is given as an example. For actual operation,
refer to the manual supplied by the machine tool builder.

Memory operation

Procedure

Press the MEMORY mode selection switch.

2 Select a program from the registered programs. To do this,

follow the steps below.
2-1 Press

key to display the program screen.

2-2 Press address

key.

2-3 Enter a program number using the numeric keys.
2-4 Press the [O SRH] soft key.

For the multi-path control, select the path to be operated with the
path selection switch on the machine operator's panel.

Press the cycle start switch on the machine operator's panel.

Automatic operation starts, and the cycle start LED goes on.
When automatic operation terminates, the cycle start LED goes
off.

To stop or cancel memory operation midway through, follow the
steps below.
a.

Stopping memory operation

Press the feed hold switch on the machine operator's panel.
The feed hold LED goes on and the cycle start LED goes
off. The machine responds as follows:
(i) When the machine was moving, feed operation

decelerates and stops.

(ii) When dwell was being performed, dwell is stopped.
(iii) When M, S, or T was being executed, the operation is

stopped after M, S, or T is finished.

When the cycle start switch on the machine operator's panel
is pressed while the feed hold LED is on, machine operation
restarts.

b. Terminating memory operation

4.AUTOMATIC OPERATION

OPERATION

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Press

the key on the MDI panel.

Automatic operation is terminated and the reset state is
entered.

When a reset is applied during movement, movement
decelerates then stops.

Explanation
- Memory operation

After memory operation is started, the following are executed:
(1)  A one-block command is read from the specified program.
(2)  The block command is decoded.
(3)  The command execution is started.
(4)  The command in the next block is read.
(5)  Buffering is executed. That is, the command is decoded to allow

immediate execution.

(6) Immediately after the preceding block is executed, execution of

the next block can be started. This is because buffering has been
executed.

(7) Hereafter, memory operation can be executed by repeating the

steps (4) to (6).

- Stopping and terminating memory operation

Memory operation can be stopped using one of two methods: Specify
a stop command, or press a key on the machine operator's panel.

•

The stop commands include M00 (program stop), M01 (optional
stop), and M02 and M30 (program end).

•

There are two keys to stop memory operation: The feed hold key
and reset key.

- Program stop (M00)

Memory operation is stopped after a block containing M00 is executed.
When the program is stopped, all existing modal information remains
unchanged as in single block operation. The memory operation can be
restarted by pressing the cycle start button. Operation may vary
depending on the machine tool builder. Refer to the manual supplied
by the machine tool builder.

- Optional stop (M01)

Similarly to M00, memory operation is stopped after a block
containing M01 is executed. This code is only effective when the
Optional Stop switch on the machine operator's panel is set to ON.
Operation may vary depending on the machine tool builder. Refer to
the manual supplied by the machine tool builder.

- Program end (M02, M30)

When M02 or M30 (specified at the end of the main program) is read,
memory operation is terminated and the reset state is entered.
In some machines, M30 returns control to the top of the program. For
details, refer to the manual supplied by the machine tool builder.

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- Feed hold

When Feed Hold button on the operator's panel is pressed during
memory operation, the tool decelerates to a stop at a time.

- Reset

Automatic operation can be stopped and the system can be made to
the reset state by using

key on the MDI panel or external reset

signal. When reset operation is applied to the system during a tool
moving status, the motion is slowed down then stops.

- Optional block skip

When the optional block skip switch on the machine operator's panel
is turned on, blocks containing a slash (/) are ignored.

- Cycle start for the multi-path control

For the multi-path control, a cycle start switch is provided for each
path. This allows the operator to activate a single paths to operate
them at the same time in memory operation or MDI operation. In
general, select the path to be operated with the path selection switch
on the machine operator's panel and then press the cycle start button to
activate the selected path. (The procedure may vary with the machine
tool builder. Refer to the appropriate manual issued by the machine
tool builder.)

4.AUTOMATIC OPERATION

OPERATION

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4.2

MDI OPERATION

In the MDI mode, a program consisting of up to 511 characters can be
created in the same format as normal programs and executed from the
MDI panel.
MDI operation is used for simple test operations.
The following procedure is given as an example. For actual operation,
refer to the manual supplied by the machine tool builder.

MDI Operation

Procedure

Select the MDI mode.

For the multi-path control, select the path for which a program is
to be created with the path selection switch. Create a separate
program for each path.

2 Press

the

key to select the program screen. The following

screen appears:

MDI program screen

At this time, program number “O0000” is inserted automatically.

3 Prepare a program to be executed by an operation similar to

normal program editing. M99 specified in the last block can
return control to the beginning of the program after operation
ends. Word insertion, modification, deletion, word search,
address search, and program search are available for programs
created in the MDI mode.

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To entirely erase a program created in MDI mode, use one of the
following methods:

a. Enter

address

key, then press the

key.

b. Alternatively, press the

key. In this case, set

parameter MCL (No. 3203#7) to 1 in advance.

To execute a program, set the cursor on the head of the program.

Push Cycle Start button on the operator's panel. By this action,
the prepared program will start.

(For the multi-path control, select the path to be operated with
the path selection switch on the machine operator's panel
beforehand.) When the program end (M02, M30) or ER(%) is
executed, the prepared program will be automatically erased and
the operation will end.

By command of M99, control returns to the head of the prepared
program.

To stop or terminate MDI operation in midway through, follow
the steps below.
a.

Stopping MDI operation

decelerates and stops.

(ii) When dwell was being performed, dwell is stopped.
(iii) When M, S, or T was being executed, the operation is

stopped after M, S, or T is finished.

When the cycle start switch on the machine operator's panel
is pressed, machine operation restarts.

b. Terminating MDI operation
Press

the key.

Automatic operation is terminated and the reset state is
entered.

When a reset is applied during movement, movement
decelerates then stops.

Explanation

The previous explanation of how to execute and stop memory
operation also applies to MDI operation, except that in MDI operation,
M30 does not return control to the beginning of the program (M99
performs this function).

- Erasing the program

Programs prepared in the MDI mode will be erased in the following
cases:

•

In MDI operation, if M02, M30 or ER(%) is executed.

•

When bit 6 (MER) of parameter No. 3203 is set to 1, and the last
block of the program is executed in single block operation

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