Object Dictionary (Od); Local Od 4 - Mitsubishi Electric A1SJ71PB96F User Manual

4. FUNCTIONS
4.5

Object Dictionary (OD)

In PROFIBUS, a communication target on the side of the server accessed from the client is called an
object, and the server must have a table called an object dictionary in which the object attribute
information is recorded. The OD on the server side is called the local OD.
The client reads the server OD via communication and retains a copy and then conducts
communication while referring to the read copy. The copy retained by the client is called the remote
OD.
4.5.1
In the AJ71PB96F/A1SJ71PB96F the memory areas shown in the table below can be registered in the
local OD as objects. Setting is done by using the software package (excluding Program Invocation).
(1) AJ71PB96F/A1SJ71PB96F objects
Object type
ST-0D
(Static Type
0D)
S-0D
(Static 0D)
DP-0D
(Dynamic PI
0D)
*1: Can only be set via a communication from the client.
Local OD
Object
Structured data type
Simple variable
array
number of records
Parameter domain
Main sequence domain
Subsequence domain
Main microcomputer domain
Submicrocomputer domain
Comment domain
Expansion comment domain
Device memory domain
Buffer memory domain
Program Invocation (PI) *1
Number of
objects
registered
32
Maximum
128
Maximum 32 Main sequence program
4-10
MELSEC-A
Supporting PC
None (AJ71PB96F/A1SJ71PB96F internal
information)
Device memory, buffer memory
(However, buffer memory cannot be
allotted to the record variable.)
Parameter
Main sequence program
Subsequence program
Main microcomputer program
Submicrocomputer program
Comment
Expansion comment
Device memory
Buffer memory