Mitsubishi Electric MELSEC-Q Structured Programming Manual page 282

FXCPU Structured Programming Manual
[Device & Common]
3. Keyword setting and access restriction
Setting status
When the permanent PLC Lock is
selected
When the keyword protection
(16digits)+customer keyword is
set
When the keyword protection
(8digits) is set
When only the keyword protection
(8digits) is set
When none of the permanent PLC
lock, keyword (16 digits), keyword
(8 digits) and customer keyword is
set
Caution on selecting the permanent PLC lock
• Once the restriction is set, it cannot be reset any more.
For resetting the restriction or for writing programs again to the PLC, all-clear the PLC memory.
Caution on registering the keywords
• The keywords are provided to restrict accesses from peripheral equipment to programs created by the
user. Carefully save and remember the keywords.
If the user forgets a registered keyword, the online operations from a programming tool to the PLC are
disabled depending on the programming tool type and the contents of the registered keyword.
• In an FX /FX
3U
customer keyword and permanent PLC lock are set.
If a memory cassette where the permanent PLC lock is set is used in an FX
is earlier than Ver. 2.61, the PLC does not function normally.
If the PLC memory is cleared or the keyword is canceled in an FX
than Ver. 2.61 for a memory cassette where the customer keyword and permanent PLC lock are set,
access restrictions set by the keyword may not be able to be removed normally.
280
The following operations are enabled in accordance with the selected protection level.
Once the restriction is set, it cannot be reset any more. For resetting the restriction or for writing
programs again to the PLC, all-clear the PLC memory.
Protection level
Write Protection
Read/Write Protection
All Online Operation Protection
The following operations are enabled in accordance with the selected protection level.
It is not possible to cancel the keywords using the customer keyword.
Protection level
Write Protection
Read/Write Protection
All Online Operation Protection
Protection level
Write Protection
Read/Write Protection
All Online Operation Protection
Protection level
Read/Write Protection
All operations are enabled.
PLC whose version is earlier than Ver. 2.61, do not use a memory cassette where the
3UC
6 Types and Setting of Parameters
Access restriction
Program
Monitoring
Read Write
Program
Monitoring
Read Write
Program
Monitoring
Read Write
Program
Monitoring
Read Write
/FX
3U 3UC
/FX PLC whose version is earlier
3U 3UC
6.5 Keyword
Present
value
change
Present
value
change
Present
value
change
Present
value
change
PLC whose version