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Configuration Extensions
372 SPU 780 01EMAN May 2002 105
Data Protect Extension
Overview Data Protect is used to protect specific 0xxxx and 4xxxx references from being
modified by Process Monitoring and Control software. Write access is allowed for all
0xxxx and 4xxxx references within the specified block.
References outside the ranges specified are protected from general Modbus data
write commands. By default, all 0xxxx and 4xxxx references are unprotected.
Editing the Data
Protect
Extension
In the Active Extensions panel select the Data Protect extension, then:
Note: If the Data Protection extension does not appear in the Active Extensions
panel, it is not a valid extension for the current controller type.
Step Action
1 Enter an address in the 0xxxx Starting Address field. Default - 0:0001.
2 Enter the number of references that are to be left unprotected in the 0xxxx
Length field. ProWORX 32 shows the protected reference ranges in the 0xxxx
Protected Ranges boxes.
Suppose you type a Start value of 00017, and a Length of 1024. The first
protected range will be from 00001 (the first possible value) to 00016 (the last
value before the Start value you entered).
There will then be an unprotected range from 00017 to 01040 (00017 + 1024).
All references above 01041 are also protected.
If you enter a length that is too high (goes beyond the addresses configured for
the controller) ProWORX 32 automatically sets the value to include all addresses
above the Starting Address fields.
3 Enter an address in the 4xxxx Starting Address field. Default - 4:0001.
4 Enter the number of references that are to be left unprotected in the 4xxxx
Length field. ProWORX 32 shows the protected reference ranges in the 0xxxx
Protected Ranges boxes.