Keyword; Plc Applicability And Access Restriction - Mitsubishi Electric MELSEC-Q Structured Programming Manual

FXCPU Structured Programming Manual
[Device & Common]
6.5

Keyword

By registering entry codes in a PLC, it is possible to restrict the PLC program change function, monitor
function and current value change function of programming tools, display modules and display units (access
restriction).
→ For the operations and function restriction of display modules, refer to the hardware manual of the
→ For the operations and function restriction of display units, refer to the manual of the display unit.
6.5.1

PLC applicability and access restriction

1. Differences in operations among keyword types
The keyword change, cancel (deletion) and reset operations vary depending on the type of registered
keyword.
Registered keyword
Permanent PLC Lock
Keyword Protection
(8digits)
Keyword Protection
(16digits)
Keyword Protection
(16digits) +
Customer keyword
The security offered by the permanent PLC lock, keyword (8 digits), keyword (16 digits) and customer
keyword is limited, and is not complete.
2. PLC applicability
Permanent PLC Lock
Keyword Protection
(8digits)
Keyword Protection
(16digits)
Customer keyword
The security offered by the permanent PLC lock, keyword (8 digits), keyword (16 digits) and customer
keyword is limited, and is not complete.
Entered keyword Change Cancel
-
Keyword (8 digits)
Keyword (16 digits)
Keyword (16 digits)
Customer keyword
Number of
Characters
characters
available in
registered as
keyword
keyword
- -
(Ver. 2.61 or later)
0 to 9, A to F 8 characters
0 to 9, A to F 16 characters
(Ver. 2.20 or later)
0 to 9, A to F 16 characters
(Ver. 2.61 or later)
Reset
The protect cannot be changed, canceled nor reset.
The keyword (8 digits) can be changed, canceled and reset.
The keyword (16 digits) can be changed, canceled and reset.
The keyword (16 digits) and customer keyword can be
changed, canceled and reset.
The customer keyword can be reset.
PLC applicability
FX , FX ,
3S 3G
FX , FX
3U 3UC
FX
3GC
Supported
Supported
Supported Supported
Supported
Supported
Supported
Supported
6 Types and Setting of Parameters
6.5 Keyword
Outline
FX , FX , FX , FX , FX , FX
1S 1N 2N 0 0S
FX , FX FX , FX
1NC 2NC U
Not supported Not supported
Supported Supported
Not supported Not supported
Not supported Not supported
1
2
PLC.
3
4
5
6
,
0N
2C
7
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