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PW_BLOCK_SIZE

About this task

PW_BLOCK_SIZE defines the IP address block size that the Project Wizard uses to determine how many IP address requests to make at one time. This is particularly useful in Windows XP SP2 and Windows 2003 Server SP1, whose security enhancements limit the number of outgoing unanswered TCP/IP requests. The security limitation can prevent the Project Wizard from finding existing PLC's in a network.If the Project Wizard does not find any PLC's that you know are on your network do the following.

Procedure

Open the Windows Administrative Tools>Event Viewer
Review the Event Viewer to see if there is a TCP/IP error.
If there is a TCP/IP error the Windows security enhancements are interfering with the Project Wizard's functionality.
Add PW_BLOCK_SIZE to the project.
Assign a value from 1 through 64.
Recommended: Assign a value that is less than 5. The slower the network, the lower the number must be.