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7.9.4 System Reserved Local Word Usage with Security
This applies to User Security only.
Note:
The Project Password is not stored in any user accessible memory location.
Internal Local Words
LW9040~9043
are the reserved words for implementing security passwords.
Local Word
Attribute
Description
LW9040 -
LW9041
Write/Read
Double word, Different levels can be activated by changing the value in this register to a
corresponding security password. Contains the last password value.
LW9042
Read only
Contains the current active security level.
LW9043
Write only
Allows the project to force the HMI to a lower security level.
Note:
A lower level cannot be forced to higher level.
7.9.5 System Reserved Retentive Word Usage with Security
This applies to User Security only.
The security passwords are stored in retentive
memory locations when the
System
Parameter|Hardware
,
System Parameter
dropdown is set to
Yes
.
Note:
This allows the security passwords
to be changed if access to them is
provided in the project.
They also are available for review if the
project is uploaded out of the HMI and
decompiled.
Retentive Word
Description
RW60071
Security Enable: 1: enables the security password feature, 0 disables it.
RW60072
Level 0 password (Lowest). 2 Word value
RW60074
Level 1 password (Middle). 2 Word value
RW60076
Level 2 password (Highest). 2 Word value
Local Bit
LB9044
Set to ON to activate Security Password System Parameter changes made in the Retentive Word area.
The System automatically resets this bit to 0 when done.
Summary of Contents for MMI-1500
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