Omron CJ Series Operation Manual page 200

5 Remote I/O Communications
Additional Information
For Mixed I/O Slave Units,
Data. Therefore, the Connect Flag and Communication Error Flag for the IN Data (InCnctNd-
Stann and InErrNdStann) are used.
*1 A Word Slave that is a combination of a Basic Unit and Expansion Unit and provides both inputs and
outputs, or a CRT1B-MD Bit Slave which provides both inputs and outputs.
Allocations for Bit Slave Unit Data
A Bit Slave Unit uses 1 point (or 1 bit) for each BOOL I/O port (BitOUT or BitIN Data) that is allocated.
There are input and output ports for each bit node address, each of which has a size of 2 points.
Each Slave Unit with 2 points is allocated the I/O ports for one node address (i.e., only the I/O ports for
the bit node address of the Slave Unit). Each Slave Unit with 4 points is allocated the I/O ports for two
bit node addresses (i.e., the I/O port for the bit node address of the Slave Unit and the next I/O port).
Example:
• Input Unit with Two Points
The BitIN Data I/O ports (BitInDat00_00 and BitInDat00_01) are used.
• Output Unit with Four Points
The BitOUT Data I/O ports (BitOutDat00_00, BitOutDat00_01, BitOutDat01_00, and
BitOutDat01_01) are used.
• I/O Unit with Two Points
The BitIN Data I/O ports (BitInDat00_00 and BitInDat00_01) and BitOUT Data I/O ports
(BitOutDat00_00 and BitOutDat00_01) are used.
The allocation patterns for Bit Slave Units are shown below. (mm = Bit node address)
Input Unit with Two Points
BitInDatmm_00 and BitInDatmm_01
Input Unit with Four Points
BitInDatmm_00 and BitInDatmm_01, BitInDatmm+1_00 and BitInDatmm+1_00
Output Unit with Two Points
BitOutDatmm_00 and BitOutDatmm_01
Output Unit with Four Points
BitOutDatmm_00 and BitOutDatmm_01, BitOutDatmm+1_00 and BitOutDatmm+1_01
I/O Unit with Two Points
BitInDatmm_00 and BitOutDatmm_00
I/O Unit with Four Points
BitInDatmm_00 and BitInDatmm_01, BitOutDatmm_00 and BitOutDatmm_01
5-48
*1
the node address of the Slave Unit is the node address for the IN
CJ-series CompoNet Master Unit Operation Manual for NJ-series CPU Unit (Cat. No. W493)