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372
Program Protection
Section 6-6
2.
All tasks (programs) can be overwritten when program read protection is
not enabled.
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 overwriting to a protect-
ed program Option.
2.
Either select PLC - Transfer - To PLC to transfer the program or select
PLC - Protection - Set Password and click the OK button.
Note
The setting to enable/disable creating file memory program files will not take
effect unless the program is transferred to the CPU Unit. Always transfer the
program after changing this setting.
Write Protection
against FINS
Commands Sent to
the CPU Unit via
Networks
It is possible to prohibit write operations and other editing operations sent to
the PLC's CPU Unit as FINS commands through a network (including write
operations from CX-Programmer, CX-Protocol, CX-Process, and other appli-
cations using Fins Gateway). Read processes are not prohibited.
FINS write protection can disable write processes such as downloading the
user program, PLC Setup, or I/O memory, changing the operating mode, and
performing online editing.
It is possible to exclude selected nodes from write protection so that data can
be written from those nodes.
An event log in the CPU Unit automatically records all write processes sent
through the network and that log can be read with a FINS command.
6-6-3
Protecting Program Execution Using the Lot Number
The lot number is stored in A310 and A311 and can be used to prevent the
program from being executed on a CPU Unit with the wrong lot number. The
lot number stored in A310 and A311 cannot be changed by the user.
The upper digits of the lot number are stored in A311 and the lower digits are
stored in A310, as shown below.
A310
A311
Manufacturing lot
number (5 digits)
Summary of Contents for CP1H-CPU - 05-2006
Page 2: ...CP1H X40D CP1H XA40D CP1H Y20DT D CP1H CPU Unit Operation Manual Revised May 2006...
Page 3: ...iv...
Page 11: ...xii TABLE OF CONTENTS...
Page 15: ...xvi...
Page 19: ...xx...
Page 31: ...xxxii Conformance to EC Directives 6...
Page 71: ...40 Function Blocks Section 1 5...
Page 133: ...102 Computing the Cycle Time Section 2 7...
Page 169: ...138 CPM1A Expansion I O Unit Wiring Section 3 6...
Page 411: ...380 Clock Section 6 8...
Page 519: ...488 Replacing User serviceable Parts Section 10 2...
Page 527: ...496 Standard Models Appendix A...
Page 535: ...504 Dimensions Diagrams Appendix B...
Page 628: ...597 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Page 629: ...598 Connections to Serial Communications Option Boards Appendix F...
Page 659: ...628 PLC Setup Appendix G...
Page 665: ...634 Index work words 159 write protection 370...
Page 667: ...636 Revision History...