YASKAWA YASNAC J50 Connecting Manual page 142

20.2 DETAILS OF SIGNALS
20.2.1 INPUT SIGNALS FOR CYCLE START (ST)
AND STOP (*SP) OUTPUT SIGNALS FOR 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 and opened, 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.
(a) While the control is in an alarm state. ( While an alarm output
or an input error output is on. )
(b) While the feedhold *SP input contact is open.
(c) While the external reset ERS input contact is closed.
(d) While the RESET button on the MDI & CRT panel is being
pushed.
(e) 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.
(a)
When a part program has been executed by manual data input in
the MDI mode.
(b) When one block of a part program has been executed with the
single block (SBK) input contact closed.
(c) 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 auto-
matic operation, the automatically controlled motions, etc. are
inter-rupted, 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.
(4)
When the feedhold input contact *SP is closed, and cycle start
input contact ST is closed and opened, 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. 20.1.
,, -;~
'TL
%F
~
.Sp CLOSED )
OPENED I
u I
I
1 1
'PL %F
1
II
I
iJ
CONTROL
(
1
STATE FEED. ~y~L~ S~A~~
FEEDHOLD CYCLESTART
HOLD
Fig. 20.1
Notes :
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. When the feedhold (*SP) input contact is opened, with the
control waiting for the completion of the M, S, T command
(waiting for FIN
input) , feedhold (SPL) output is turned on,
but
when the M, S, T, command completion (FIN) input
contact is opened, the control enters feedhold state.
20.2.2. INPUT AND OUTPUT FOR CONTROL OPER-
ATION MODES (JOG, H, S, T, MD!, 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
1
H: Manual handle
1
Manual operation
S: Manual step feed mode
T: Tape operation mode
MD1 Manual data input operation mode
I
Automatic operation
MEM: Memory operation mode
mode
EDT: Program editing mode
When any of the input contacts is closed, the corresponding oper-
ation mode is turned on.
(a) JOG: Manual jog mode input
When the JOG input contact is closed, and other mode input
con-tacts 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, +Y, -Y, +Z, -Z, +c( and -rx
signals.
(b) H: Manual HANDLE mode input
When the H input contact is closed, and other mode input
contacts are opened, the control enters the manual handle mode
and the machine will be fed manually by the manual pulse
generator according to the specified multiplication factor on the
selected axis.
(c) S: Manual STEP feed mode
When the S input contact is closed, and other mode input
contacts are opened, the control enters the manual step feed
mode and the machine will be fed in steps.
(d) T: Tape operation mode
When the T input contact is closed and other mode input
contacts are opened, the control enters the tape operation mode,
and the machine will be controlled by the tape commands read
by the tape reader.
(e) MDI: Manual data input operation mode input
When the MDI input contact is closed, and other mode input
contacts are opened, the control enters the manual data input
mode, and part programs will be written or the machine will be
operated through MDI.
(~ MEM: Memory operation mode input
When the MEM input contact is closed, and other mode input
contacts are opened, the control enters the memory operation
mode, and the machine will be controlled by part programs
stored in the memory.
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