NEC NEAX 2400 IPX, Руководство пользователя

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CHAPTER 5 NDA-24299
Page 64
Revision 1.0
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.
N C N : N etw ork C ontrol N ode
LN : Local N ode
A S Y D N
A S Y D L
L N
L N
LN LN
LN
L N
LN
LN
N C N
Ind ex 5 14 (N D M )= 01 H
A S Y D L
Index 51 3 (L D M )=0 1H
Index 51 4 (N D M )= 01H
Inde x 51 3 (L D M )= 01H
Inde x 51 4 (N D M )= 01H
Note
Note:
ASYDL must be assigned at each node on the network.
E ach bit corresponds to one block having 2M B ytes.
N D M blo cks
(IN D E X 5 1 4 )
L D M blo cks
(IN D E X 51 3 )
block #4
block #3
block #2
block #1
block #0
block #2
block #1
block #0
R e la tio n sh ip b e tw e e n B it a n d B lo ck N u m b e r
IN D E X B it (S e ttin g ) M e an ing
513
(LD M )
514
(N D M )
0 (1)
1 (0) N ote
2 (0) N ote
3 (0)
4 (0)
5 (0)
6 (0)
7 (0)
0 (1)
1 (0) N ote
2 (0) N ote
3 (0) N ote
4 (0) N ote
5 (0)
6 (0)
7 (0) M em ory Block #0
M em ory Block #1
M em ory Block #2
M em ory Block #0
M em ory Block #1
M em ory Block #2
M em ory Block #3
M em ory Block #4
N ot used
N ot used
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 B lock(s) for som e reason.