Mitsubishi Electric F920GOT-K Hardware Manual page 228

GOT-F900 SERIES (CONNECTION)
Contents of trouble
"CAN NOT WRITE."
is displayed on the
GOT-F900 screen.
"CAN NOT USE THE
FUNCTION WHILE
PROTECTED." is
displayed on the
GOT-F900 screen.
"PLC IS RUNNING."
is displayed on the
GOT-F900 screen.
Check points and countermeasures
Programs and device set values of the FX Series PLC
cannot be changed.
• Causes
The write-protect switch of the memory cassette is set
to ON. PLC Password protection is on.
• Countermeasures
Set the write-protect switch to OFF.
Enter the keywords by "SELECT MODE"-"OTHER
MODE"-"ENTRY CODE".
Programs and device set values of the FX Series PLC
cannot be changed.
• Causes
PLC Password protection is on.
• Countermeasures
Enter the keywords by "SELECT MODE"-"OTHER
MODE"-"ENTRY CODE".
An attempt was made to edit the set value of the timer
or counter, or the current value of the file registers of
the FX Series PLC.
• Cause
Such changes are disabled while the FX Series PLC
equipped with the EEPROM memory cassette is
running. (Data saved in the built-in EEPROM can be
changed.)
Such changes are also disabled when the PLC is
equipped with EPROM memory cassette.
• Countermeasures
Run the FX Series PLC using the built-in memory.
Specify the set value of the timer (T) and the counter
(C) indirectly through the data register (D).
Connection of MELSEC-F FX Series PLC 8
OS version
F940W F940
1.10 or 6.10 or
later later
From From
first first
product product
From From
first first
product product
F930 F920
From
4.10 or
first
later
product
From From
first first
product product
From From
first first
product product
8-24