
Chapter 1
Overview of the MAP Communication
Environment
1-7
Figure 1.8
Abstract Object Models are Part of the VMD Model
OSI Network
The OSI coprocessor
VMD
Resources
abstract object models
I - 12413
The models define abstract objects which are part of the VMD. An
application program calls on the MMS services associated with a particular
object to perform operations on that object. The objects implemented
within your OSI coprocessor are listed in the table below:
The:
Are acted upon by MMS:
And allow an MMS client
1
to:
domain objects
Domain Management Services upload or download a memory image
within the system associated within
an MMS server
program invocation
objects
Program Invocation
Management Services
control the operational state of the
program(s) associated with an MMS
server
variable objects
Variable Access Services
access data within the system
associated with an MMS server.
1
Refer to the section titled
Clients, Servers and the VMD
, later in this chapter, for an
explanation of MMS clients and servers.
There are other object models within the MMS specification. The three
listed above are the only objects currently implemented by your OSI
coprocessor. The following sections briefly describe how the OSI
coprocessor implements them.
Domain Objects Implemented by the OSI Coprocessor
Your OSI coprocessor implements a single domain object that represents
the PLC–5 controller’s entire memory image.
Program Invocation Objects Implemented by the OSI Coprocessor
Your OSI coprocessor implements a single program invocation object,
which allows an MMS client to place the PLC–5 controller into different
modes (i.e., program, test, and run mode). A program invocation object is
Содержание PLC-5 MAP/OSI
Страница 1: ...PLC 5 MAP OSI Software User Manual Cat No 1785 OSI AB Parts...
Страница 4: ...Table of Contents iii OSI Layer Management E 1...
Страница 57: ...Chapter 4 Basic Programming Techniques 4 7 For example B7 6 10 AB Parts...
Страница 91: ...Mapping MMS Data Types onto PLC 5 40 5 60 File Types Appendix A A 2 T ACC D 16 AB Parts...