445
Program Protection
Section 8-7
Note
1.
If the CX-Programmer is used to read a task with task read protection ap-
plied, an error will occur and the task will not be read. Likewise, if the PT
Ladder Monitor function is used to read a password protected task, an er-
ror will occur and the task will not be read.
2.
The entire program can be transferred to another CPU Unit even if individ-
ual tasks in the program are read-protected. The task read protection will
remain in effective for the password-protected tasks.
3.
When the CX-Programmer is used to compare a user program in the com-
puter's memory with a user program in the CPU Unit, password-protected
tasks will be compared too.
Restrictions to Function
Block Use
Function block definitions can be read even if the entire program or individual
tasks in a program containing function blocks are read-protected. If required,
set read protection individually for each function block.
Prohibiting Backing Up
the Programs to a Memory
Cassette
Overview
When a password is set for the entire user program or for a task from the CX-
Programmer, prohibiting backing up the user program can be set as an option.
Doing so will make it impossible to upload PLC data to the CX-Programmer
and make it impossible to save PLC data offline to a storage device.
Operating Procedure
1,2,3...
1.
When registering a password in the UM read protection password Box or
Task read protection Box, select the Prohibit from saving to a memory
card, and transferring program from PLC Option.
2.
Go online and then either select PLC - Transfer - To PLC to transfer the
program or select PLC - Protection - Set Password and click the
OK
but-
ton.
Application
The above procedure enables using a password to protect against disclosure
of the program to unauthorized persons.
When a password is set for the entire user program, or for one or more tasks,
backing up the user program (i.e., creating an OBJ program file) can be prohibited.
CX-Programmer
Password?
CPU Unit
A program file (.OBJ) cannot be created with file memory operations.
Creating a backup to a Memory
Cassette online can be prohibited.
No PLC data
can be uploaded.
CX-Programmer
Memory Cassette
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
▲
Properties
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: ......