CTI Products NCB/FL with Fiber Interface - Manual (Page 24)

CTI Products, Inc. NCB-EL/FL User Guide
Appendix A. Factory Default Configuration 21
A
PPENDIX
A
PPENDIX
A. F
ACTORY
D
EFAULT
C
ONFIGURATION
Control Neuron Processor
Restoring Factory Default Communication Parameters
If the Control Neuron Processor or router module communication parameters are overwritten by a network
management tool, they can be restored as follows:
• Press the “RESET” button on the front of the NCB unit
• After the “ERR” LED goes off, press the “RESET” button a second time.
The Control Neuron communication parameters are now restored to factory defaults.
IP Address Parameters
The units are factory programmed as follows:
• IP Address: Unique address based on MAC address of module
• IP Address Mode: Multicast
• IP Multicast Address: 224.000.001.016
• Subnet Mask: 255.255.255.0
Router
The router portion of the NCB module may be configured for various operational characteristics. The factory
default configuration is as a repeater, where all messages entering the NCB module (via any of the three data
ports described in section “1. I
NTRODUCTION ” are simply passed through, regardless of the domain,
subnet/node, or group destination address of the message. Other algorithms, can be selected using standard
L
ON W ORKS network management tools such as the LonBuilder, LonMaker, or LNS.
Further details of router operation and configuration are contained in the Echelon document entitled
"L
ON W ORKS Router User's Guide", Echelon part number 078-0018-01B.
Address Assignments
The router inside the NCB module contains two Neuron chips, each with its’ own subnet/node number
assignment. The default factory configuration of the router Neurons is subnet 255 node 126 and subnet 255
node 127. If any other nodes in the system to which the NCB is connected are configured with either of these
subnet/node addresses, the router should be reconfigured to different addresses using any standard network
management tool. The Control Neuron processor default address setting is subnet 255 node 1.
Buffer Configuration
The NCB module utilizes buffers to store incoming messages and route them out to other ports. The
configuration of these buffers (the number of bytes in each buffer as well as the number of buffers) determine
the maximum size message that can be passed and the performance of the NCB module under conditions of
bursty traffic. In the standard configuration, the NCB router restricts the maximum size message that can be
passed to a length of 40 to 50 bytes of user data, depending on the addressing overhead in the packet.
Technical Note TN010 discusses the topic of buffers and buffer sizes in detail, and should be referenced if
messages to be passed through the NCB module could exceed the maximum default size.