
B–62884EN/01
3. OPERATION
113
(d) Unlocking write-protection
Press function key
F10
[Wrt On] to unlock write protection of
the contents of addresses displayed on the window. The color of
cursor changes to red from yellow. And the function key
F10
changes to [WrtOff].
Warning
Signal status changes should always be made with extreme
care. Signal status changes can have serious and
unforeseen results on a control system, and on the process
to which it applies, if they are improperly used. It is
recommended that these functions not be used with people
near the equipment.
(e) Changing status
Move the cursor in the window by the cursor keys,
Page
Up
and
Page
Down
to the signal you want to change, then press
Enter
key to
make the signal status change.
Enter
key turns a signal status ON
which was OFF, and turns a signal status OFF which was ON.
CONST
R00000 0 1 000010: 42
R00001 0 0000010: 02
R00004 0 0000000:00
–OFF––ON–
Signal Status
Fig.3.4.6.1 (r)
Note
Some signals may not change their status even if you
change them, because the Ladder diagram writes the
signals frequently, or the signals are frequently updated by
NC, MMC, or the external I/O devices such as I/O-Link: NC
writes signals on F-address, MMC on M-address, and the
external I/O devices on X-address.
(f) Enabling write-protection again
Press function key
F10
[WrtOff] to re-protect the contents of
addresses on the window from unforeseen changes. The color of
cursor returns to yellow from red. And the function key
F10
returns to [Wrt On].