Table of Contents
Advertisement
B-10
ControlNet Overview
Publication CNET-UM001C-EN-P - November 2005
Default Parameters
When a ControlNet network is powered-up for the first time, it comes up with
a default set of ControlNet parameters capable of sending only unscheduled
data. The default set of network parameters in all ControlNet devices, is:
• Network Update Time (NUT) = 100ms
• Scheduled Maximum Node Address (SMAX) = 0
The SMAX is the highest network address of a node that can use the
scheduled service.
• Unscheduled Maximum Node Address (UMAX) = 99
The UMAX is the highest network address of a node that can
communicate on the ControlNet network. The UMAX must be set
equal to or higher than the SMAX.
• Assumed maximum cable lengths and maximum number of repeaters
With this default ControlNet network, you can have unscheduled
communication between the various devices on the network by using such
software packages as RSNetWorx for ControlNet, RSLogix5000 and RSLinx.
The ControlNet network should be configured using
IMPORTANT
RSNetWorx for ControlNet software to improve
performance.
At a minimum, we recommend that the Unscheduled
Maximum Node Address (UMAX) be set equal to the
highest node address on the network. Leaving this
parameter at the default value of 99 will waste bandwidth
and reduce system performance.
We also recommend setting the Scheduled Maximum Node
Address (SMAX) to a value 3 or 4 above the highest
scheduled node address to allow you to expand the network
in the future.
Hide quick links:
Advertisement
Table of Contents
