Publication 1769-UM009B-EN-P - May 2002
4-12 Configuring the DeviceNet Network
Module Tab
Interscan Delay
This parameter defines the delay time the scanner uses between scans
of the DeviceNet network. If you have slave devices configured for
Polled behavior in the 1769-SDN’s scanlist, Interscan Delay (ISD)
defines the amount of time the scanner waits between DeviceNet I/O
updates.
Increasing the ISD time causes a longer network scan, which
adversely affects overall input-to-output performance. However, the
increase allows lower priority messages to get more network access.
These lower priority messages include those used to do network
browsing and configuration upload/download functions. So, if these
network functions are sluggish on your system, increase the ISD time.
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