Raco Bit Addressing - Raco Catalyst Owner's Manual

2. Locate the correct byte: Sequentially write F000, 0F00, 00F0, and 000F to the
Analog register. Note which value turns the bit on. The bit will be set to 1 when
F (1111) is written the byte that contains it.
3. Locate the correct bit: Sequentially write 1, 2, 4, and 8 to the byte positon that
turned the bit on in step 2. If the bit came on when you wrote 0F00, write 0800,
0400, 0200, and 0100 to the register. The bit in question will turn on. Converting
the number to binary will show the correct bit. If 0400 turned on the bit, then the
bit location would be where the 1 occurs in the binary representation: 0000
0100 0000 0000

RACO Bit Addressing

RACO Catalyst bit addressing for Modbus TCP and EtherNet/IP both conform to the
Modbus standard order for consistency. The Discrete registers (bits) are addressed
sequentially starting at the most significant bit position (little endian order)
Modbus TCP and EtherNet/IP Bit
16-bit (Analog) Register 1*2*40001
Rockwell Tag
Raco:O.Data[0].15
Raco:O.Data[0].14
Raco:O.Data[0].13
Raco:O.Data[0].12
Raco:O.Data[0].11
Raco:O.Data[0].10
Raco:O.Data[0].9
Saved: 2015-08-03
Filename:
Catalyst EtherNet Option Setup R5 V01.docx
Addressing
Bit Position Hex Value
0 8000
1 4000
2 2000
3 1000
4 0800
5 0400
6 0200
RACO Manufacturing and Engineering
Copyright © 1998-2015 RACO. All rights reserved.
1 bit (Discrete) Register
SNA
1*2*00001
1*2*00002
1*2*00003
1*2*00004
1*2*00005
1*2*00006
1*2*00007
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