YASKAWA YASNAC J50 Connecting Manual page 109

19.2 DETAILS OF SIGNALS
19.2.1 INPUT SIGNALS FOR CYCLE START (ST),
STOP (*SP) OUTPUT SIGNALS DURING CYCLE
START (STL) AND FEEDHOLD (SPL)
(1) With the control in any of the TAPE, MEMORY, and MDI
modes, when the input contact ST is closed, the control starts
automatic operation control to execute the part program, and at
the same time, turn on the STL output signal for cycle start.
However, an ST input is neglected under the following
condition.
While the control is in an alamr state.
(While an alarm output or an input error output is on.)
While the feedhold *SP input contact is open.
. While the external reset ERS input contact is closed.
While the RESET button on the MDI & CRT panel is being
pushed.
. While the system No. switch is in any state except for O and 4.
(2) When the following state is entered after cycle start, the control
completes operation control, and turns off the STL output.
. When a part program has been executed by manual data input in
the MDI mode.
. When one block of a part program has been executed with the
single block (SBK) input contact closed.
~When the program end (EOP) input contact has been closed by
an M command of a part program.
(3) When the feedhold input contact "*SP" is opened during
automatic operation, the automatically controlled motions, etc.
are interrupted, and at the same time the cycle start output STL
is turned OFF and the feedhold output SPL is turned ON.
While a block of thread cutting instruction is being executed,
the feedhold input is neglected, unless the control is equipped
with Thread Interruption function.
(4) When the feedhold input contact *SP is closed, and cycle start
input contact ST is closed, temporary stop SPL is turned OFF,
and automatic operation is restarted. The cycle start output
STL is turned ON also.
Timing chart for input of cycle start (ST), feedhold (*SP), and
cycle start (STL)and temporary stop (SPL) is shown in Fig.
19.1.
*Asterisked signals activate at LOW.
(Normally closed contacts)
ST
STL
"SP
SPL
:::g~
~,, ~ ON
CLOSED
I
I
OPENED
I
u I
I
ON
OFF
CONTROL
STATE
Notes :
1
I
I
-1 11
I
I
I
I
I
I
I
~~E&' CYCLE START
FEEDHOLD
CYCLE START
Fig. 19.1
1. Be sure to keep the cycle start (ST) and feedhold (*SP) input contacts
closed or open at least for 100 ms. If the duration is shorter than this, the
input may sometimes be neglected.
2. The operation of the cycle start (ST) input contact is reversed by
parameter STUD (#6007D6).
When the parameter is set to 1, the closing of the contact will start the
operation of the control.
3. When the feedhold (*SP) input contact is opened, with the control
waiting for the completion of the M, S, T, instruction (waiting for FIN
input) feedhold (SPL) output is turned on, but when the M, S, T
instruction completion (FIN) input contact is opened, the feedhold (SPL)
output is turned off, and the control enters feedhold state.
19.2.2 INPUT AND OUTPUT FOR CONTROL
OPERATION MODES (JOG, H/S, T, MDI, MEM, EDT,
AUT, MAN)
(1) Operation Mode Input
The following six operation modes of the control are selected by
the respective input contacts.
JOG:
Manual jog mode
H/S: Manual handle/manual step
1
Manual
feed mode
operation
T: Tape operation mode
MDI: Manual data input operation
Automatic
mode
MEM: Memory operation mode
operation mode
EDT: Program editing mode
When any the input contacts is closed, the corresponding operation
modes is tuned on.
JOG: manual jog mode input
When the JOG input contact is closed, and other mode input
contacts are opened, the control enters the manual jog mode, and
the machine is jogged in the respective directions in response to the
input of +X, -X, +Z and -Z signals.