291
Startup Settings and Maintenance
Section 6-6
Read/write-protection Using Passwords
Both read and write access to the user program area can be blocked from the
CX-Programmer. Protecting the program will prevent unauthorized copying of
the program and loss of intellectual property. A password is set for program
protection from a Programming Device and access is prevented to the whole
program.
Note
1.
If you forget the password, the program within the PLC cannot be trans-
ferred to the computer. Make a note of the password, and store it in a safe
place.
2.
If you forget the password, programs cannot be transferred from the com-
puter to the PLC. Programs can be transferred from the computer to the
PLC even if the password protection has not been released.
Password Protection
1,2,3...
1.
Register a password either online or offline as follows:
a) Select the PLC and select Properties from the View Menu.
b) Select Protection from the PLC Properties Dialog Box and input the
password.
2.
Set password protection online as follows:
a) Select PLC, Password Protection, and then Set. The Program Pro-
tection Setting Dialog Box will be displayed.
b) Click the OK button.
Confirming the User Program Date
With a CS1-H, CJ1-H, or CJ1M CPU Unit, the dates the program and param-
eters were created can be confirmed by checking the contents of A090 to
A097.
Auxiliary Area Words
Name
Address
Description
User Program
Date
A090 to
A093
The time and date the user program was last over-
written in memory is given in BCD.
A09000 to A09007
Seconds (00 to 59 BCD)
A09008 to A09015
Minutes (00 to 59 BCD)
A09100 to A09107
Hour (00 to 23 BCD)
A09108 to A09115
Day of month (01 to 31 BCD)
A09200 to A09207
Month (01 to 12 BCD)
A09208 to A09215
Year (00 to 99 BCD)
A09300 to A09307
Day (00 to 06 BCD)
Day of the week:
00: Sunday, 01: Monday,
02: Tuesday, 03: Wednesday,
04: Thursday, 05: Friday,
06: Saturday
Parameter Date
A094 to
A097
The time and date the parameters were last overwrit-
ten in memory is given in BCD. The format is the
same as that for the User Program Date given
above.
Summary of Contents for CJ1G-CPU series
Page 3: ...iv...
Page 5: ...vi...
Page 21: ...xxii Conformance to EC Directives 6...
Page 169: ...148 Task Control Instructions Section 3 32...
Page 203: ...182 Programming Device Operations for Tasks Section 4 4...
Page 253: ...232 Using File Memory Section 5 3...
Page 337: ...316 Other Functions Section 6 11...
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Page 369: ......
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Page 381: ...360 Revision History...