Rockwell Automation 1769-SM1 Compact I/O to DPI/SCANport Module - Manual (Page 52)

4-4 Understanding the I/O Image
The data valid bits (0-4) can be used in the user ladder program to
determine if the received data is valid and can be used. Bits 8-14 provide
general information about the connected product. Bits 6 and 7 provide
diagnostic feedback on the status of the 1769-SM1 module configuration.
The Logic Command is a 16-bit word of control produced by the
controller and consumed by the 1769-SM1 module. The Logic Status is a
16-bit word of status produced by the 1769-SM1 module and consumed
by the controller.
This manual contains the bit definitions for compatible products
available at the time of publication in
Appendix E . For other products,
refer to their documentation.
The Reference (16 bits or 32 bits) is produced by the controller and
consumed by the 1769-SM1 module. The Feedback (16 bits or 32 bits) is
produced by the 1769-SM1 module and consumed by the controller. The
size of the Reference/Feedback is determined by the drive and displayed
with Parameter 5 - [Ref/Fbk Size 1], Parameter 22 - [Ref/Fbk 2], and
Parameter 39 - [Ref/Fbk 3] in the 1769-SM1 module. For example, the
Reference/Feedback for CH1 is shown below:
8-10 DPI/SCANport Port ID Bits 8, 9, & 10 represent the connected port # on the drive:
10 9 8
0 0 1 = Port 1
0 1 0 = Port 2 (typical)
0 1 1 = Port 3
1 0 0 = Port 4
1 0 1 = Port 5
1 1 0 = Port 6
1 1 1 = Port 7
11 SCANport Host “1” = a SCANport Host (1305, 1336 PLUS II, etc.) is
connected
12 DPI Host “1” = a DPI Host (PowerFlex 70, 700, etc.) is connected
13 32-bit Datalinks “0” = 16-bit Datalinks are used
“1” = 32-bit Datalinks are used
14 32-bit Ref/Fdbk “0” = 16-bit Reference / Feedback are used
“1” = 32-bit Reference / Feedback are used
15 Not used Reserved for future use
Using Logic Command/Status
Using Reference/Feedback
Size Valid Values Output Image Input Image Example
16-bit -32768 to 32767 Word 2 Word 2 Table 4.B
32-bit -2147483648 to 2147483647 Word 2 to 3 Word 2 to 3 Table 4.B