Omron CJ1W-DRM21, CS1W-DRM21 operation manual 108

User-set Allocations Section 4-4

•The first bit for node allocations is always bit 00 when setting alloca- tions with the allocated DM Area words, but can be either bit 00 or bit 08 with the Configurator. (Allocations for slaves with two bytes or more cannot start at bit 08.

Setting through the Allocated DM Area Words (Master User Allocations Table)

All slaves are allocated words in order of node addresses in two blocks: OUT block 1 and IN block 1.

	OUT areas
Area specified in I/O memory	Bit
	First word	Address 0
Bit	specified	Node addresses
		in ascending order
First word specified
OUT block 1	to	to
to

	IN areas
Bit	Bit
First word specified	First word specified	Address 0
		Node addresses
	IN block 1	in ascending order
to
	to	to

Addresses are in ascending order. Not all nodes need to be allocated and addresses for nodes with no allocations are skipped.

Output to Slaves

Addresses are in ascending order. Not all nodes need to be allocated and addresses for nodes with no allocations are skipped.

Input from Slaves

The block allocation order and block allocation areas can be set. Node addresses in each block are allocated words in ascending order from 0 to 63. Node addresses that are not allocated are skipped (not allocated words). Each address is allocated at least one byte (rightmost byte, 1 word, or multiple words).

•More than one word is allocated for each slave (according to it’s node address) with more than16 I/O points.

•The rightmost byte of the word is allocated to each slave that has less than 16 I/O points.

Note Multiple Master Units can be included in a single PC as shown below using user-set allocations (16 Units max.).

Master Unit

Master Unit

Slave

Slave

108