Yaskawa i80M Connecting Manual - Manual (Page 134)

(3)
(4)
1.
When the feedhold input contact “ SP” is opened during automatic operation, the auto-
matically controlled motions, etc. are interrupted, and at the same time the cycle start out-
put 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 disregarded.
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 and tem-
porary stop is shown in Fig. 20.4.
ST
STL
*ST
SPL
OPENED
I I
ON
I
OFF 1
CLOSED
I
OPENED
I
I
OFF 1
I
CONTROL
I 1
,
STATE
Fig. 20.4
FEEDHOLD ‘ CYCLE
HOLD
Timing Chart for Input of Cycle Start (ST), Stop
( * SP), and Output of Cycle
Feedhold
NOTE
Be sure to keep the cycle start (ST) and feedhold ( SP) input contacts closed or open for
at least 100 ms. If the duration is shorter than this, the input may sometimes be disregarded.
When the feedhold ( SP) input contact is opened, with the control waiting for the comple-
tion of the M, S, T, instruction (waiting for FIN input), feedhold output is turned on, but
when the M, S, T, instruction completion (FIN) input contact is opened, the control enters
feedhold state.
3. During SBK stoppage, the STL signal is OFF.
The STL signal remains ON while the ALM condition exists.
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