Omron CS1W-DRM21, CJ1W-DRM21 operation manual User-set Allocations Methods

User-set Allocations Section 4-4

4-4 User-set Allocations

With a CS/CJ-series DeviceNet Unit, remote I/O communications slaves can be allocated in any area (CIO, WR, HR, DM, or EM) using one of the following methods.

•Setting through the allocated DM Area words (Master User Allocations Table)

•Setting through the Configurator

User-set Allocations Methods

Method		Set through the allocated DM Area	Set through the Configurator
		words (Master User Allocations Table)
Allocation areas		CIO: 0000 to 6143
		WR: W000 to W511
		HR: HR000 to HR511
		DM: D00000 to D32767
		EM: E00000 to E32767 (Banks 0 to C)
No. of allocated blocks		2 blocks: OUT 1 and IN 1	4 blocks: OUT 1, IN 1, OUT 2 and IN 2
		OUT 1 and IN 1 can be created anywhere	OUT 1, IN 1, OUT 2, and IN 2 can be cre-
		in the above areas.	ated anywhere in the above areas.
Block allocation order		Any order
Node address order		Allocations must be in order of node	Any order
		addresses (0 to 63 in ascending order)	Note 1. Node addresses do not have
		Note 1. Not all nodes need to be allo-
			to correspond between blocks.
		cated, reducing the number of	2. One node address cannot be
		words required.
			allocated to different blocks.
		2. Node addresses do not have
		to correspond between blocks.
Start bit for allocations		All allocations start from bit 00 (Cannot	Allocations can start from bit 00 or bit 08.
		start from bit 08. All allocations are in 1	Allocations starting from bit 08 are in
		word units.)	1-byte units only.
Allocation size	Per block	500 words max.
	Total size	1,000 words max. for a total of 2 blocks	2,000 words max. for a total of 4 blocks
Slave allocation	Slaves with	The leftmost byte (bits 07 to 15) cannot be used.
limits	more than 8
	points
	Slaves with 8	Allocated to the leftmost or rightmost bytes (not allocated a word)
	points
	Slaves with 16	Allocated one word
	points
	Slaves with	Allocated multiple words (with an odd number of bytes, only the rightmost byte is allo-
	more than 16	cated in the last word)
	points

Note Functions will vary as shown below depending on whether allocations are set through the allocated DM Area words (Master User Allocations Table) or through the Configurator.

•Words are always allocated to slaves in order of ascending node ad- dresses when allocations are set with the allocated DM Area words. The order can be determined by the user when the Configurator is used. (However, even when using the allocated DM Area words, nodes do not have to be allocated words, reducing the number of words re- quired.)

•Only two blocks (OUT 1 and IN 1) can be allocated when setting are made with the allocated DM Area words area, but there are four blocks (OUT 1/2 and IN 1/2) available with the Configurator.

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