Allen-Bradley 1747-ASB - Page 7

Publication 1747-UM006B-EN-P - June 2003
ii Table of Contents
Chapter 3
Addressing
Chassis Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Slot Numbering. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Addressing I/O Modules . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
2-Slot Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
2-Slot Addressing Considerations . . . . . . . . . . . . . . . . . 3-5
2-Slot Addressing Examples . . . . . . . . . . . . . . . . . . . . . 3-6
1-Slot Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
1-Slot Addressing Considerations . . . . . . . . . . . . . . . . . 3-8
1-Slot Addressing Examples . . . . . . . . . . . . . . . . . . . . . 3-9
1/2-Slot Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
1/2-Slot Addressing Considerations. . . . . . . . . . . . . . . . 3-11
1/2-Slot Addressing Examples. . . . . . . . . . . . . . . . . . . . 3-12
How I/O Module Images Are Mapped . . . . . . . . . . . . . . . . 3-13
How Discrete I/O Modules Are Mapped . . . . . . . . . . . . 3-13
How Specialty I/O Module Images Are Mapped . . . . . . 3-14
When Block Transfer Mode is Selected . . . . . . . . . . . . . 3-14
When Discrete Mode is Selected. . . . . . . . . . . . . . . . . . 3-15
Chapter 4
Configuration
DIP Switch Information . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
DIP Switch SW1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Logical Group Number (SW1-7,8). . . . . . . . . . . . . . . . . 4-4
DIP Switch SW2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Primary/Complementary Chassis (SW2-3) . . . . . . . . . . . 4-5
Reserved (SW2-4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
Special Image and Chassis Size Considerations. . . . . . . . . . 4-13
Not Enough 1747-ASB Module Image to Map All of the
Available Slots . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13
1747-ASB Image Size Exceeds Slot Requirements. . . . . . 4-14
One Slot of Pair is Present, and 1747-ASB Module Image is
Available for Both Slots . . . . . . . . . . . . . . . . . . . . . . . . 4-14
Both Slots Of A Pair Are Available But There Is Only Enough
1747-ASB Module Image Space Available For One Slot . 4-15
DIP Switch SW3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15
Processor Restart Lockout (SW3-2) . . . . . . . . . . . . . . . . 4-17
Addressing Mode (SW3-5,6) . . . . . . . . . . . . . . . . . . . . . 4-20
Specialty I/O Mode (SW3-7). . . . . . . . . . . . . . . . . . . . . 4-21
I/O Module Keying (SW3-8). . . . . . . . . . . . . . . . . . . . . 4-21
Switch Setting Summary . . . . . . . . . . . . . . . . . . . . . . . . . . 4-22
SW2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-22
SW3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-23
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