Figure 5-4 Assignment Of Memory Block; Figure 5-5 Ldm And Ndm Allocation (Asydl) - NEC NEAX 2400 IMX Manual

DATA PROGRAMMING
Assignment of System Data
2. Assignment of System Data
STEP 1: ASYDL and ASYDN
Assign the number of data memory blocks for the Network Data Memory (NDM) and the Local Data
Memory (LDM). Use the ASYDN command for the NCN. Use the ASYDL command for all nodes.
Figure 5-4 shows ASYDL Indexes 513 and 514 as an example.
The ASYDN command is used at NCN only. Use the ASYDL command at all nodes.
ASYDL
Index 513 (LDM)=01H
Index 514 (NDM)=01H
Note: ASYDL must be assigned at each node on the network.
(1) Assign the following data to all nodes.
• ASYDL, Index 513
Assign 1 for bit(s) corresponding to the data memory block to be used as Local Data Memory (LDM).
Assign 01H for systems having 2M-LDM.
• ASYDL, Index 514
Assign 1 for bit(s) corresponding to the data memory block to be used as Network Data Memory (NDM).
Assign 01H for systems having 2M-NDM.
Allowable memory block of LDM and NDM assigned by ASYD are shown in Figure 5-5.
Each bit corresponds to one block having 2M Bytes.
block #1
block #0
block #2
block #1
block #0
Note: These bits are normally assigned as "0" (i.e. "01H" is normally set for both INDEX 513 and 514). The flagging of the bit(s)
is possible, but only in case that your system should use the bit-corresponding Memory Block(s) for some reasons.
(2) Assign the data to NCN only.
• ASYDN, Index 514
Assign 1 for bit(s) corresponding to the data memory block to be used as Network Data Memory (NDM).
Assign 01H for systems having 2M-DM.
CHAPTER 5
Page 62
Revision 3.0
LN
NCN
Note
ASYDN
Index 514 (NDM)=01H
LN
ASYDL
Index 513 (LDM)=01H
Index 514 (NDM)=01H

Figure 5-4 Assignment of Memory Block

Local Data Memory (LDM) usage
Network Data Memory (NDM) usage
block #4
block #3
block #2
NDM blocks
(INDEX 514)
LDM blocks
(INDEX 513)

Figure 5-5 LDM and NDM Allocation (ASYDL)

Network Data Memory (NDM) usage
ND-70185 (E)
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LN LN
LN
LN
Relationship between Bit and Block Number
INDEX Bit (Setting)
0 (1)
1 (0) Note
2 (0) Note
513
3 (0)
(LDM) 4 (0)
5 (0)
6 (0)
7 (0)
0 (1)
1 (0) Note
2 (0) Note
514 3 (0) Note
4 (0) Note
(NDM)
5 (0)
6 (0)
7 (0)
NCN: Network Control Node
LN: Local Node
LN
LN
Meaning
Memory Block #0
Memory Block #1
Memory Block #2
Not used
Memory Block #0
Memory Block #1
Memory Block #2
Memory Block #3
Memory Block #4
Not used