Chapter 1
Overview of the MAP Communication
Environment
1-3
Each node on an OSI network is equipped with a layer mechanism that
incorporates the ‘‘rules” of the OSI standard. Each layer is able to ‘‘talk”
with only its counterpart within the node sending/receiving the data (figure
1.3).
Figure 1.3
Each Layer Communicates With its Counterpart Within Another Node
Application
Presentation
Session
Transport
Network
Data Link
Physical
A node with OSI protocol
implementation.
Application
Presentation
Session
Transport
Network
Data Link
Physical
A node with OSI protocol
implementation.
OSI Network
I - 12408
Your OSI coprocessor implements Manufacturing Automation Protocol
(MAP). MAP is one set of OSI protocols.
Manufacturing Automation Protocol (MAP) is a set of protocols based on
the OSI seven–layer reference model described in the previous section.
MAP specifies a set of protocols that must accomplish certain tasks within
each of the model’s seven layers. Your OSI coprocessor implements the
MAP 3.0 Protocol.
The seventh and first layers of the reference model are the two layers that
are most distinct to your application. The seventh layer is the Application
layer, with which your OSI coprocessor first interacts with your application
program. The first layer is the Physical layer, with which your OSI
coprocessor connects to the network media (figure 1.4). Your OSI
coprocessor physically connects to MAP 802.4 network media.
Manufacturing Automation
Protocol (MAP)
Summary of Contents for PLC-5 MAP/OSI
Page 1: ...PLC 5 MAP OSI Software User Manual Cat No 1785 OSI AB Parts...
Page 4: ...Table of Contents iii OSI Layer Management E 1...
Page 57: ...Chapter 4 Basic Programming Techniques 4 7 For example B7 6 10 AB Parts...
Page 91: ...Mapping MMS Data Types onto PLC 5 40 5 60 File Types Appendix A A 2 T ACC D 16 AB Parts...