YASKAWA YASNAC J50 Connecting Manual page 149

20.2.15 PROGRAM RESTART (SRN) INPUT
Table 20.6
This input is used when a part program is to be started again after
interruption. Close the SRN input contact, turn on the memory
mode, and search the sequence number 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 ntr~ber are
displayed on the CRT.
For the details of the uses of the uses of the PST input, refer to
Par. 5.2.4, program Restart in YASNAC J50M Instruction Manual
(TOE-C843-12.30).
20.2.16 EDIT LOCK (EDTLK)
This is the input for preventing the change of the contents of the
stored part program. While the EDTLK input contact is closed, the
following operations among the ones in the program edit mode are
prohibited.
\
Mod.
Manurd Operation Automatic Operation
Mode
* +LX
Motion stop in +X
Input opened direction
* .LX
Motion stop in -X
Input opened
direction
* +LY Motion stop in +Y
Input opened I direction '
* _L~
Motion stop in -rx
Input opened I direction
*Activating at LOW. (Normally closed contacts.)
1. Storing part programs by the MEM DATA "IN' key.
2. The change, addition and deletion of part programs in the mem-
ory are made with the EDIT "ALT," "INS" and "ERS" keys.
20.2.17 AUXILIARY FUNCTION LOCK (AFL) INPUT
This is the input for omitting the M, S, T, function in executing part
programs in the automatic operation mode.
While the AFL input contact is closed, the control ignores M. S.
T. instructions of programs when executing part programs.
However, M code decoded outputs (MOOR, MOIR, M02R, M30R)
are output.
When the AFL input contact is closed or opened during the exe-
cution of part programs, the change becomes effective from the
block subsequent to the current block.
NOTE
Analog outputs at S-command 5 digits are provided as commanded
when "AFL" input is closed.
20.2.18 OVERTRAVEL (x+ LX, x-LX, x+LY, x-LY,
*+L Z, x-LZ, x+Lu, x-Let,) INPUT
These input signals are for signifying the arrival of the machine
slides to their respective stroke ends. When these overtravel input
contacts are opened, the machine slides stop motion as shown
below, and close the alarm (ALM) output contact and at the same
time, displays alarm on the CRT.
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 RESET operation to clear 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 or T codes is required to be stopped by
overtravelling inputs, interlock the motion with external
sequence.
20.2.19 MACHINE-READY (MRD) INPUT
This input informs that the external heavy-current circuit is ready.
When MRD input is closed after closing of Servo Power Input/
Output (SVON) from the power-on/off unit of the control after the
power is turned on, the control is ready and "RDY" is displayed on
the CRT screen.
When MRD input is opened with the control being ready, the
control is put in the alarm state (alarm code "280" is displayed),
thereby stopping the operation.