Omron CJ1W-DRM21 Routing Tables, Relay network table, as described below, Local Network Tables

Using FINS Message Communications		Section 6-3
	3. In all cases other than the following two exceptions, a local network table
	must be made, and the DeviceNet Unit must be registered in it.
	a) When there is only one DeviceNet Unit.
	b) When only multiple DeviceNet Units are mounted, with no remote I/O
	communications.
	4. A local network table is sometimes necessary even when the DeviceNet
	Unit is not operating across networks.
	5. If you prepare a local network table inside the CPU Unit, be sure to register
	the DeviceNet Unit.
	6. Even if a local network table exists inside the CPU Unit, the 7-segment dis-
	play of the DeviceNet Unit may indicate “HC” and FINS message/explicit
	message communications may not be possible unless the DeviceNet Unit
	is registered in the local network table.
Routing Tables
	The routing tables register the communications path from a Communications
	Unit on the local PC, such as a DeviceNet Unit, Controller Link Unit, SYSMAC
	LINK Unit, or Ethernet Unit, to the network to which the remote PC is con-
	nected. The routing tables are made up of two tables, the local network table
	and the relay network table, as described below.
Local Network Tables	The local network table lists the unit numbers of the Communications Units
	mounted to the PC and the addresses of the Networks to which each Unit
	belongs. If multiple Communications Units are mounted to one PC CPU Unit,
	the local network table is used to distinguish between network addresses.

The following type of table is used to show which Communications Unit data must be sent through to reach a destination network address, when sending data to a network address from one PC’s CPU Unit.

Local Network Address

CPU Bus Unit’s unit number

Local network: The address (1 to 127) of the network to which the Communi- cations Unit belongs.

CPU Bus Unit’s unit number: The unit number of the CPU Bus Unit.

Example

Unit #00

Unit #01

Unit #02

Network address 1

Network address 2

Network address 3

Local Network Table

Address of local	CPU Bus Unit’s
network	unit number
1	00

146