NEC NEAX2400 system manual Assignment of System Data

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 5-4shows ASYDL Indexes 513 and 514 as an example.

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 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.

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 bit-corresponding Memory Block(s) for some reasons.

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.

CHAPTER 5 ND-70185 (E)

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