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CHAPTER 5 ND-70185 (E)
Page 62
Revision 3.0
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.
Figure 5-4 Assignment of Memory Block
(1) Assign the following data to all nodes.
• ASYDL, Index 513 Local Data Memory (LDM) usage
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 Network Data Memory (NDM) usage
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.
Figure 5-5 LDM and NDM Allocation (ASYDL)
(2) Assign the data to NCN only.
• ASYDN, Index 514 Network Data Memory (NDM) usage
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.
NCN: Network Control Node
LN: Local Node
ASYDN
ASYDL
LN
LN
LN
LN
LN
LN
LN
LN
NCN
The ASYDN command is used at NCN only. Use the ASYDL command at all nodes.
Index 514 (NDM)=01H
ASYDL
Index 513 (LDM)=01H
Index 514 (NDM)=01H
Index 513 (LDM)=01H
Index 514 (NDM)=01H
Note
N
ote: ASYDL must be assigned at each node on the network.
Each bit corresponds to one block having 2M Bytes.
NDM blocks
(INDEX 514)
LDM blocks
(INDEX 513)
block #4
block #3
block #2
block #1
block #0
block #2
block #1
block #0
Relationship between Bit and Block Number
INDEX Bit (Setting) Meaning
513
(LDM)
514
(NDM)
0 (1)
1 (0) Note
2 (0) Note
3 (0)
4 (0)
5 (0)
6 (0)
7 (0)
0 (1)
1 (0) Note
2 (0) Note
3 (0) Note
4 (0) Note
5 (0)
6 (0)
7 (0)
Memory Block #0
Memory Block #1
Memory Block #2
Memory Block #0
Memory Block #1
Memory Block #2
Memory Block #3
Memory Block #4
Not used
Not used
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.