Publication 1769-UM009B-EN-P - May 2002
Overview 1-5
1769-SDN Module Data
Tables
To manage the flow of data between your controller and network
devices, the scanner uses input and output data images to transfer
data, status and command information between the scanner and the
controller.
The basic structure is shown below. See Chapter 5 for more detailed
information.
Input Data Image
The input data image is transferred from the scanner module to the
controller across the Compact I/O bus.
Output Data Image
The output data image is transferred from the controller to the scanner
module across the Compact I/O bus.
Table 1.2 Input Data
Word Description Data Type
0 to 65 Status Structure 66-word array
66 to 245 DeviceNet Slave Inputs 180-word array
Table 1.3 Output Image
Word Description Data Type
0 and 1 Module Command Array 2-word array
2 to 181 DeviceNet Slave Outputs 180-word array
Table 1.4 Module Command Array Bit Assignments
Word Bit Operating Mode
0 0 1 = Run, 0 = Idle
1 1 = Fault
2 1 = Disable Network
3
Reserved
(1)
(1)
DO NOT manipulate Reserved Bits. Doing so may interfere with future compatibility.
41 = Reset
5 to 15
Reserved
(1)
10 to 15
Reserved
(1)
Allen-Bradley Drives
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