Network Update Time (Nut) Considerations - Honeywell TC-RPFM01 Implemenation Manual

ControlNet Fiber Media
Fiber Optic Coupling Scheme

Network Update Time (NUT) considerations

The default NUT settings for every ControlNet Interface (CNI) module are as follows:
•
NUT Time = 10000 microseconds
•
Smax = 1
•
UMax = 20 (w/KTC card) or 24 (w/PCIC card)
•
Number of Repeaters = 0
•
Cable Length = 1000 Meters
•
Cable Usage = A+B
•
My System uses Fiber Optics = No Checkmark
Since the Number of Repeaters and Cable Length settings affect the maximum
communications delay time in the network, you may need to adjust these settings to
match your network configuration. Set the Number of Repeaters to equal the number of
repeaters (fiber and/or coax) used in series in the longest cable (fiber and/or coax) path
between two nodes in the link. Set the Cable Length to equal the longest communications
distance (fiber and/or coax cable) between two nodes in the link, if greater than 1000
meters (3,280 feet). Also, if you use fiber optic cable in your network, you must check
the checkbox for the My System uses Fiber Optics selection.
You can use the Network Tools (NTools) utility supplied with the Experion PKS
Engineering Tools to change the network parameters (Keeper Values) in a CNI with an
address of one. Please refer to the NTools online Help for more information.
6 Experion PKS ControlNet Fiber Optic Implemenation Guide
Honeywell
R210
10/04