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
The ASYDN command is used at NCN only. Use the ASYDL command at all nodes.
LNLN
NCN: Network Control Node
LN: Local Node
LN
NCN
Note
ASYDL
Index 513 | (LDM)=01H | ASYDN |
Index 514 | (NDM)=01H | Index 514 (NDM)=01H |
LN
LN
LN
ASYDL
LN
LN
Index 513 (LDM)=01H
Index 514 (NDM)=01H
Note: ASYDL must be assigned at each node on the network.
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
•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
Allowable memory block of LDM and NDM assigned by ASYD are shown in Figure
Each bit corresponds to one block having 2M Bytes.
block #4 |
|
block #3 |
|
block #2 |
|
block #1 |
|
block #0 |
|
block #2 |
|
block #1 | NDM blocks |
block #0 | (INDEX 514) |
LDM blocks (INDEX 513)
Relationship between Bit and Block Number
INDEX | Bit (Setting) | Meaning | ||
| 0 | (1) |
| Memory Block #0 |
| 1 | (0) | Note | Memory Block #1 |
513 | 2 | (0) | Note | Memory Block #2 |
3 | (0) |
| Not used | |
(LDM) | 4 | (0) |
| |
| 5 | (0) |
|
|
| 6 | (0) |
|
|
| 7 | (0) |
|
|
| 0 | (1) |
| Memory Block #0 |
| 1 | (0) | Note | Memory Block #1 |
| 2 | (0) | Note | Memory Block #2 |
514 | 3 | (0) | Note | Memory Block #3 |
(NDM) | 4 | (0) | Note | Memory Block #4 |
| 5 | (0) |
| Not used |
| 6 | (0) |
| |
| 7 | (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
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
CHAPTER 5 |
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Revision 3.0
