Remote I/O Adapter Specifications - AB Quality Allen-Bradley 1394 User Manual

Remote I/O Adapter Specifications

The table below lists the remote I/O adapter specifications for the
system module (1394x-SJTxx-C-xx, -L-xx, and -T-xx systems).
The: Is:
Baud rate 57.6 k, 115.2 k, or 230.4 k (user-selectable)
Rack address User-selectable between 0 and 31 decimal
Rack width User-selectable in quarter-rack increments (1/4, 1/2, 3/4, or full)
Transfer type I/O Group
Block 0 2 4 6
Discrete 1 3 5 7
Discrete
Discrete
Discrete
Discrete
Discrete
Discrete
Starting I/O group 0 2 4 6
Rack width 1/4
Number of discrete I/O bits • 12 dedicated inputs
• 12 dedicated outputs
• 1/4 rack width with 4 inputs and 4 outputs
• 1/2 rack width with 36 inputs and 36 outputs
• 3/4 rack width with 68 inputs and 68 outputs
• Full rack width with 100 inputs and 100 outputs
Maximum block transfer 64 words (128 bytes)
length
Block transfer data types • User variable values
• Axis data parameter value
• Axis data bit state
• Master cam position point values
• Master cam time point values
• Slave cam position point values
• Axis or system variable value
Block transfer data formats • 32-bit (double-word) 2s compliment integer
• 16-bit (single-word) 2s compliment integer
• 32-bit (8-digit) signed BCD
• 32-bit IEEE floating point
• Word-swapped 32-bit (double-word) 2s compliment integer
• Word-swapped 32-bit (8-digit) signed BCD
• Word-swapped 32-bit IEEE floating-point
Specifications
0 2 4 0 2
1 3 5 1 3
2 4 6 2 4
3 5 7 3 5
4 6
5 7
0 2 4 0 2
1/2 3/4
Publication 1394-5.0 — May 2000
A-15
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