Assignment Of System Data; Figure 5-4 Assignment Of Memory Block; Figure 5-5 Ldm And Ndm Allocation (Asydl) - NEC NEAX 2400 IPX 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
A S Y D L
Index 513 (LD M )=01H
Index 514 (N D M )=01H
ASYDL must be assigned at each node on the network.
Note:
(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
E ach bit corresponds to one block having 2M B ytes.
block #2
block #1
block #0
N ote: These bits are norm ally assigned as "0" (i.e. "01H " is norm ally set for both I N D EX 513 and 514). The flagging of the bit(s)
is possible but only if your system should use the bit-corresponding M em ory Block(s) for som e reason.
(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 64
Revision 1.0
shows ASYDL Indexes 513 and 514 as an example.
LN
N C N
Note
Index 514 (N D M )=01H
LN
Index 513 (LD M )=01H
Index 514 (N D M )=01H

Figure 5-4 Assignment of Memory Block

Local Data Memory (LDM) usage
Network Data Memory (NDM) usage
block #4
block #3
block #2
block #1
block #0
N D M blocks
(IN D E X 514)
LD M blocks
(IN D E X 513)

Figure 5-5 LDM and NDM Allocation (ASYDL)

Network Data Memory (NDM) usage
LN
A S Y D N
LN
A S Y D L
R elationship betw een B it and B lock N um ber
IN D E X B it (S etting)
0
1
2
513
3
(LD M ) 4
5
6
7
0
1
2
514 3
(N D M ) 4
5
6
7
NDA-24299
NCN : Network C ontrol N ode
LN
LN: Local N ode
LN
LN
LN
Figure 5-5.
M eaning
(1) M em ory Block #0
(0) N ote M em ory Block #1
(0) N ote M em ory Block #2
(0)
N ot used
(0)
(0)
(0)
(0)
(1) M em ory Block #0
M em ory Block #1
(0) N ote
(0) N ote M em ory Block #2
(0) N ote M em ory Block #3
(0) N ote M em ory Block #4
(0)
N ot used
(0)
(0)