PART 1: CX-Programmer
OMRON
CHAPTER 5 – Advanced Topics
CX-Programmer _Page 85
Use the following procedure to convert program to PLC types.
1, 2, 3…
1. Double-click the PLC object in the project workspace. The Change PLC dialogue is
displayed, part of the CX-Server application. Change its CPU and PLC device to the new
type.
2. A program check is performed to ensure there are no errors. It is not possible to convert a
program that contains errors.
3. The programs are converted before replacing them. Any addresses and instructions that
cannot be directly replaced are listed in the
Compile
tab of the Output window.
4. CX-Programmer displays a confirmation dialogue to replace the old programs with the
new. If there are conversion errors (listed in the output window), it is best to select the
Cancel
pushbutton to abort the conversion and change the original programs to remove
the conversion problems. If the conversion is acceptable, select the
OK
pushbutton to
replace the programs.
CX-Programmer’s program conversion process is not capable of making all program adjustments automatically.
If an instruction from the old PLC does not have a direct equivalent in the new PLC then CX-Programmer
produces a warning that the conversion is not available. In addition, some addresses cannot be converted.
Note:
When a program is copied and pasted from one PLC type to another, it does
not
undergo
program conversion. It is good practice to ensure that programs are already converted before
copying them to another PLC (by first changing the source PLC type to the target PLC type).
As a general rule, it is easier to convert upwards from C-series PLCs to CV-series PLCs to CS/CJ-series PLCs.
Applying a Password to the PLC Programs
It is possible to apply protection to a PLC or the program(s) it contains. This protection stops CX-Programmer
from uploading or comparing a program, and so provides commercial copyright security. It also stops unwanted
editing of guarded programs.
Generally all passwords are set on the
Protection
tab of the PLC Properties dialogue and are
activated or deactivated by selecting the corresponding
Set Password
button or
Release
Password
button from the toolbar.
The protection that is provided, and the mechanism for protection, depends upon the series of the PLC.
C-Series PLCs
For certain C-series PLCs the password is embedded in the program using a specific ladder construct and is not
specified on the PLC properties page. The password must be entered as four hexadecimal digits as shown below.
Check the availability of password protection in the appropriate manual for the PLC.
The program must first be set up with an open contact with the address ‘AR10.01’ applied. The password
protection can then be applied. The password can be any four-digit number. To set the password, select the
Protection
tab within the PLC Properties dialogue. The following example illustrates the functionality of the
password protection, with the password of ‘1111’.
When enabled, the password is required every time the program is accessed. To set and release the protection
after the program is protected, select
Protection Write Protect
from the
Transfer
menu.
CV-Series PLCs
Two levels of password protection are provided for CV-series PLCs, ‘System protection password’ and ‘Partial
protection password’, both of which are set on the PLC Properties dialogue.
Summary of Contents for Sysmac WS02-CXPC1-EV3
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