Allen-Bradley 1747-SN - Understanding Slot Addressing

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4–31Scanner Configuration and Programming

Publication

17476.6 - July 1996

This section provides information about:

• 2-slot addressing

• 1-slot addressing

• 1/2-slot addressing

Understanding slot addressing is critical to most efficiently allocate

your scanner’s I/O image files.

Slot addressing refers to how each remote chassis slot is assigned a

specific amount of the I/O image. The amount depends on which

type of slot addressing you choose at your adapter; 2-slot, 1-slot, and

1/2-slot addressing is available, as shown below:

2Slot

Addressing

Two slots are addressed as one logical group.

1Slot

Addressing

One slot is addressed as one logical group.

1/2Slot

Addressing

One slot is addressed as two logical groups.

Slot 1

Slot 1Slot 2

Slot 1

Slot 1Slot 2

Input Image

Output Image

Remote Chassis

07815 07815

For more information on slot addressing, refer to your ASB module

user manual.

Note that slot addressing (e.g., 1/2-, 1-, and 2-slot) may not apply to

all types of RIO devices. Refer to each RIO device’s user manual to

determine the type of slot addressing required.

Understanding Slot

Addressing

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