Omron CP1H CPU

378
Program Protection Section 6-6
CPU Unit DIP Switch
Confirming the User Program Date
The dates the program and parameters were created can be confirmed by
checking the contents of A90 to A97.
Auxiliary Area Words
Write-protection
Using Passwords
The program (or selected tasks) can also be write-protected if the write pro-
tection option is selected from the CX-Programmer when a password is being
registered for the entire program or those selected tasks. The write protection
setting can prevent unauthorized or accidental overwriting of the program.
Note 1. If the selected tasks are write-protected by selecting this option when reg-
istering a password, only the tasks (program) that are password-protected
will be protected from overwriting. It will still be possible to overwrite other
tasks with operations such as online editing and task downloading.
Pin Name Settings
SW1 User Program Memory Write Protection ON: Protected
OFF: Not protected
Name Address Description
User Program
Date
A90 to A93 The time and date the user program was last over-
written in memory is given in BCD.
A90.00 to A90.07 Seconds (00 to 59 BCD)
A90.08 to A90.15 Minutes (00 to 59 BCD)
A91.00 to A91.07 Hour (00 to 23 BCD)
A91.08 to A91.15 Day of month (01 to 31 BCD)
A92.00 to A92.07 Month (01 to 12 BCD)
A92.08 to A92.15 Year (00 to 99 BCD)
A93.00 to A93.07 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 A94 to A97 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.
CX-Programmer
Password?
When a password is being registered for the entire user
program or selected tasks, program write-protection can be
enabled/disabled with an option setting.
The user program cannot be overwritten.
CPU Unit
Overwriting can be prohibited with password protection,
regardless of the DIP switch setting.
Memory Cassette
The user program cannot be overwritten.