Allen-Bradley 1756-RM2 User Manual

Rockwell Automation Publication 1756-UM535D-EN-P - November 2012 95
Configure the ControlNet Network Chapter 5
Network Update Time
The network update time (NUT) that you specify for your redundant system
impacts your system performance and your switchover response time. Typical
NUTs used with redundant systems range from 5…10 ms.
NUTs with Multiple ControlNet Networks
You can choose to use multiple ControlNet networks with your enhanced
redundancy system.
Figure 28 - Example of Two ControlNet Networks
When you use multiple ControlNet networks, the networks must use compatible
NUTs. Compatible NUTs are determined based on the network that uses the
smallest NUT.
CH2 CH1 OK
CH2 CH1 OK
ControlNet Network 1
NUT = 5 ms
ControlNet Network 2
NUT =
 21 ms

Allen-Bradley 1756-RM2 Specifications

General

Brand	Allen-Bradley
Model	1756-RM2
Category	Control Systems
Language	English