
B-63983EN/02 6.OPERATING THE PMC SCREEN
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6.2.2 PMC Parameter Input/Output Conditions
Input from the PMC parameter screen
Usually, no data can be entered for PMC parameters because they are
protected. The following methods can be used to make it possible to
enter data for them.
(1) If the sequence program is running (RUN state) (usually, this
method should be used when the machine is operating.)
(a) Place the NC in MDI mode or bring it to an emergency stop.
(b) Set "PWE" on the NC setting screen to 1 (see the following
table).
(c) Alternatively, set the program protect signal (KEY4) to 1
(only if counters or data tables are involved).
(d) The parameters are released from protection; so data can be
entered for them (see the following table).
PWE KEY4
Timer ¡
Counter ¡¡
Keep relay ¡
Data table ¡¡
(e) After entering data for the parameters, return "PWE" or the
KEY4 signal to the previous state.
(2) If the sequence program can be stopped (STOP state), for
example, while it is being debugged
(a) Stop the sequence program.
(b) The parameter protection is released; so data can be entered
for them.
WARNING
If a sequence program is stopped while the machine
is operating, the machine may behave
unexpectedly. Before stopping the sequence
program, make sure that nobody is near the
machine and that the tool cannot interfere with the
workpiece or machine. Incorrect operation of the
machine presents an extreme risk of death or
serious injury to the user. Damage the tool,
workpiece, and/or the machine is also likely.
NOTE
1 These operations may be protected by the
programmer protection function. For details of the
programmer protection function, see "PROTECT
PMC PARAM" in Subsection 6.2.1.
2 If you set "RAM WRITE ENABLE" to "YES", the
change of the PMC parameters is enabled,
regardless of the above operations and the other
protection. For details "RAM WRITE ENABLE", see
"RAM WRITE ENABLE" in Subsection 6.2.1.