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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.
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