443
Program Protection
Section 8-7
Task Read Protection
3.
If an incorrect password is input five times consecutively, read protection
will not be released even if the correct password is input on the sixth at-
tempt and displaying and editing the entire user program or the specified
tasks will be disabled for two hours.
Read Protection for Individual Tasks Using Passwords
Overview
It is possible to read-protect individual program tasks (referred to as “task
read protection” below) or the entire PLC. The same password controls
access to all of the read-protected tasks.
Task read protection prevents anyone from displaying or editing the read-pro-
tected set of tasks from CX-Programmer without inputting the correct pass-
word. In this case, the entire program can be uploaded, but the read-protected
tasks cannot be displayed or edited without inputting the correct password.
Tasks that are not read-protected can be displayed, edited, or modified with
online editing.
Note
Task read protection cannot be set if UM read protection is already set. How-
ever, it is possible to set UM read protection after task read protection has
been set.
MAC Address:
01234567890A
00
NC
02
04
06
08
10
00
02
04
06
08
10
01
COM
03
05
07
09
11
01
03
05
07
09
11
BKUP
ERR/ALM
LNK/ACT
SYSMAC
CP1L
POWER
RUN
INH
1
00
01
02
03
04
06
00
01
03
04
06
COM
02
COM
05
07
COM
COM(V+)
05
07
ANALOG INPUT
V1+ V2+ COM
2
END
END
END
CX-Programmer
Password?
Set a password for particular tasks in the project directory.
Those tasks cannot be displayed without inputting the password.
CP1L-EL/EM CPU Unit
The entire user program can be uploaded, but password-
protected tasks will not be displayed until the password is input.
The other tasks can be displayed/edited and are also accessible
through online editing.
Read
Summary of Contents for CP1L-EL20DR-D
Page 3: ...CP1L EL20D CP1L EM30D CP1L EM40D CP1L EL EM CPU Unit Operation Manual Produced July 2017...
Page 4: ...iv...
Page 10: ...x...
Page 22: ...xxii...
Page 34: ...xxxiv Software Licenses and Copyrights 7...
Page 192: ...158 Trial Operation and Debugging Section 5 3...
Page 250: ...216 Automatic Clock Adjustment and Specifying Servers by Host Name Section 6 7...
Page 666: ...632 Trouble Shooting Section 11 7...
Page 696: ...662 Standard Models Appendix A...
Page 805: ...771 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Page 806: ...772 Connections to Serial Communications Option Boards Appendix F...
Page 836: ...802 PLC Setup Appendix G...
Page 838: ...804 TCP Status Transitions Appendix H...
Page 840: ...806 Ethernet Network Parameters Appendix I...
Page 842: ...808 Buffer Configuration CP1L EL EM Appendix J...
Page 844: ...810 Ethernet Specifications Appendix K...
Page 851: ...Index 817 work words 118 write protection 447...
Page 852: ...818 Index...
Page 854: ...820 Revision History...
Page 855: ......