YASKAWA YASNAC J50 Connecting Manual page 116

For the details of the usage of the PST input, refer to 5.2.3 Mea-
sured Workpiece Value Direct Input in YASNAC J50L Instruction
Manual (TOE-C843- 12.20).
19.2.16 PROGRAM RESTART (PRST) INPUT
This input is used when a part program is to be started again after
interruption. Close the PRST input contact, turn of the memory
mode, and search the sequence No. of program restart by the NC
operator's panel. The M, S, T codes present between the leading
end of the program and the searched sequence No. are displayed on
the CRT.
For the details of the usage of the PST input, refer to "5.2.6
Program Restart" in YASNAC J50L Instruction Manual (TOE-
C843-12.20).
19.2.17 EDIT LOCK (lNHEDT)
This is the input for preventing the change of the contents of the
stored part program. While the INHEDT input contact is closed,
the following operations, among the ones in the program edit mode,
are prohibited.
. Storing part programs by the MEM DATA "IN" key
. The change, addition or deletion of part programs in the memory
with the EDIT "ALT," "INS" and "ERS" keys.
19.2.18 AUXILIARY FUNCTION LOCK (AFL) INPUT
This is the input for omitting the M, S, T function in executing part
program in the automatic operation mode.
While the AFL input contact is closed, the control disregards M,
S, T instructions of programs when executing part programs.
However, M code decoded outputs (MOOR, MOIR, M02R, M30R)
are outputted.
When the AFL input contact is closed or opened during the exe-
cution of part programs, the change become effective from the
block subsequent to the current block.
NOTE
With S4-digit instructions analog outputs are output in accordance
with the instructions, even while the AFL input contact is closed.
19.2.19 SETUP POINT RETURN (SRN) INPUT
19.2.20 INTERRUPTION POINT RETURN (CPRN)
INPUT
This is the input for positioning the machine at the interruption
point by manual jogging after the control was switched over from
the automatic operation mode to the manual operation mode, and
subsequently moved away under manual control.
While the CPRN input contact is closed, manual jogging motion
stops after arrving at the interruption point. When the machine is at
the interruption point, manual jogging is impossible unless the
CPRN input contact is opened.
19.2.21 OVERTRAVEL (*+ LX, *-LX, *+LZ, *-LZ)
INPUTS
These input signals are for signifying the arrival of the machine
slides at their respective stroke ends. When there overtravel input
contacts are opend, the machine slides stop motion, as shown in
Table 19.7, and close the alarm (ALM) output contact and, at the
same time, display alarm on the CRT.
Table 19.7
~
Input Opened
I
-X direction
Motion stop of all
A+LZ Motion stoD in
axes
Inp~t Opened
+Zdirection
* -LZ Motion stop in
Input Opened
-Z direction
When an overtravel input contact is opened, move the machine in
the reverse direction in the manual operation mode (manual jogging
or manual pulse generator) to close the contact, and then make the
alarm output and display.
NOTE
Even when the overtravel input contacts are opened, the M code
reading output (MF, S code reading output SF, and the T code reading
output TF are not turned off. If the motion by M codes, S codes of T
codes must be stopped by overtraveling inputs, interlock the motion
with external sequence.
This is the input for positioning the machine at the setup point by
manual jogging.
While the SRN input contact is closed, manual jog motion stops
as the machine arrives at the setup point. When the machine is at
the setup point, manual jogging is impossible unless the SRN input
contact is opened.
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