Omron CS1W-DRM21 Multiple masters cannot share the same slave, Changing System Components

User-set Allocations Section 4-4

4. Multiple masters cannot share the same slave.

MasterMaster

Slave

5.Be sure to use user-set allocations and operate the Master Unit with the scan list enabled if multiple masters are connected to a single network. Communications will not be possible if there is more than one master with the scan list disabled connected to a network.

Changing System Components

In the following situations, the table must be reset, the Master User Alloca- tions Switch (word n, bit 11) turned ON, and the scan list recreated:

•Adding a slave

•Removing a slave

•Changing a node address

•Changing a node allocation There is no need to clear the scan list.

Example Settings for User-set Allocations through Allocated DM Area Words

This example uses the following settings for unit number 0.

•OUT block 1 area and first word: WR (04 Hex), 50 (0032 Hex)

•IN block 1 area and first word: WR (04 Hex), 100 (0064 Hex)

•Allocation Size Setup Table area and first word: DM (03 Hex), 00100 (0064 Hex)

This example shows user-set allocations for the following slaves.

Node address		Outputs	Inputs	Product
0		16 pts	0 pts	16-pt Transistor Output Terminal (DRT1-
				OD16)
1		8 pts	8 pts	8-pt input and 8-pt Output Environment-
				resistant Terminal (DRT1-MD16C)
2		16 pts	16 pts	CQM I/O Link Terminal (CQM1-DRT21)
3		0 pts	8 pts	8-pt Transistor Input Terminal (DRT1-
				ID08)
4		None		---
5		160 pts	160 pts	CS/CJ-series DeviceNet Unit (CS1W-
				DRM21) (Slave Unit)
	Master User Allocations Table
		OUT block 1 area: WR (04 Hex)
		First word of OUT block 1: 50 (0032 Hex)
		IN block 1 area: WR (04 Hex)
		First word of IN block 1: 100 (0064 Hex)
		Area for the Allocation Size Setup Table: DM (03 Hex)
		First word of the Allocation Size Setup Table: 00100 (0064 Hex)

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