Coactive Aesthetics ROUTER-LL, User Manual

11

Message Buffers

The information in this section is meant to supplement the discussion on 
message buffers in Chapter 2 of the LonWorks Router User’s Guide. An 
additional source of information on message buffers can be found in 
Chapter 6 of the Neuron C Programmer’s Guide.

The buffer types described in the LonWorks Router User’s Guide are actu-
ally a subset of the buffers available on each side of the RTR-10 Router 
Core Module. The complete list of buffer types, which are the same as 
those available on any Neuron Chip, is given below:

•

Receive Transaction Buffers

•

Transmit Transaction Buffers

•

Input Application Buffers

•

Output Application Buffers

•

Input Network Buffers (referred to as “Input Buffers” in the LonWorks
Router User’s Guide)

•

Output Network Buffers (referred to as “Normal Output Buffers” or
“Non-Priority Output Buffers” in the LonWorks Router User’s Guide)

•

Priority Output Application Buffers

•

Priority Output Network Buffers (referred to as “Priority Output
Buffers” in the LonWorks Router User’s Guide)

The buffer types not mentioned in the LonWorks Router User’s Guide are 
used only for network management messages sent to the RTR-10 Module. 
The count and size of these buffers should never be changed or the RTR-
10 Module will not function correctly.

The maximum number of bytes available for the buffers in each side of 
the RTR-10 Module is 1475. Of these bytes, 221 are reserved for the 
Receive Transaction, Transmit Transaction, Input Application, Output 
Application, and Priority Output Application Buffers. This leaves 1254 
bytes available for the Input Network, Output Network, and Priority 
Output Network Buffers. If the total number of bytes for these buffers 
exceeds 1254, the ROUTER-LL will not function correctly. 

The counts and sizes of message buffers in the ROUTER-LL are typically 
configured in the network services tool and set when the router is 
installed. The values for the counts and sizes of the buffers are restricted 
by the RTR-10 firmware. The legal values are:

•

Count must be either 1, 2, 3, 5, 7, 11, 15, or 23.

•

Size must be either 42, 50, 66, 82, 114, 146, 210 or 255.