Chapter 6 - Application Notes; Peer-To-Peer Communication (Bsap Master/Slave Modules) - Bristol Babcock Network 3000 Setup Manual

As discussed earlier in this manual, an application is a program or function that
makes use of the data link to transmit messages. Among the commonly used
applications are elements of the ACCOL load itself such as Master Modules used for
peer-to-peer communication. Open BSI Utilities or DOS-based tools such as UOI
are applications because they make use of the data link to collect data from
controllers in the network. HMI/SCADA packages such as OpenEnterprise,
® ®
Intellution FIX , and Iconics Genesis are also applications.
This section will discuss various applications, and provide configuration hints and
tips. Not all information presented is strictly related to communications, but it is
nonetheless important when trying to improve system performance.
Peer-to-Peer Communication
Peer-to-peer communication is the transfer of signal list or data array data from
one Network 3000 controller to another. This transfer is performed using Master
Modules (or EMaster Modules) and Slave Modules.
Peer-to-peer communication is typically used in situations where one controller
must make some logical decision based on data from another controller.
Another reason to use peer-to-peer communication is if greater user control is
required over when communications occur. The user can create ACCOL logic to
activate the Master Module only at certain times or when certain data is ready.
Do NOT confuse Master/EMaster Modules and Slave Modules with Master
nodes/Ports and Slave nodes/Ports. They are NOT the same things.
The following are certain things the user should be aware of when setting up peer-
to-peer communication:
• Users must designate which signal list or data array must be transferred. Signal
lists on both ends must have the same number of entries, and data arrays on
both ends must
communication transmits data values only; it does not, for example, transmit the
signal names, inhibit/enable status information, etc.
• A given controller can participate in peer-to-peer communication with its Master
node, any of its slave nodes, and any sibling nodes (nodes that share the same
Master).
Network 3000 Communications Configuration Guide

Chapter 6 - Application Notes

NOTE:
IMPORTANT
have identical row/column
(BSAP Master/Slave Modules)
dimensions. Peer-to-peer
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