Rockwell Automation 8720MC Drives Integration Manual - Manual (Page 103)

Publication 8720MC-IN002A-EN-P — December 2002
Using the Human Interface Module (HIM) B-9
Viewing Bit Pattern Some parameters, such as “Dig_Output_Status” (parameter 661), have
a bit pattern that you can view, and in some cases, change. You can
use your HIM to see what each bit means.
For example, if you want to check if the orient complete bit is being
set for your analog spindle application perform the following:
Navigate through the HIM menu tree structure to parameter 667,
“Digital_Output_6”, which is located in the file: “I/O Interface” and
the group: “Digital Outputs”.
1. Make sure the output link for Digital Output 6 is parameter 583
“Orient Complete”. This is the default link for the analog spindle
configuration as determined by parameter 501.
2. Navigate through the HIM menu tree structure to parameter 661
“Dig_Output_Status”, which is located in the file: “I/O Interface”
and the group: “Digital Outputs”.
3. Press the enter key to view the bit pattern definition. Bit 0 is
located in the lower right. The bits are numbered from 15 to 8 on
the top row and 7 to 0 are on the bottom row. An “x” in any bit
position indicates that bit is not defined. A “1” indicates the output
is on. A “0” indicates the output is off.
4. In this example, if we were to execute a spindle orient, output 6
would transition from 0 to 1 after the orient was complete. This
means that bit 5 of the Dig_Output_Status would transition from 0
to 1 as shown in Figure B.6.
5. For the 8720MC there are 10 digital outputs in the file: “I/O
Interface” and the group: “Digital Outputs”. Depressing the
increment up key will progressively steps your through the output
assignments for digital outputs 1 thru 10. If you wish to change an
output assignment, first locate the output you wish to change and
then press enter. Press select to locate the curser in the parameter
field. Use the increment up and increment down keys to change
the output parameter assignment. Press enter to save your changes
and press exit to step up one level in the parameter tree.
Figure B.6
Bit Pattern Display
O u t u p t I m a g e
x x x x 0
0 0 0 0 0 0 0
0
30387-I-O
x x
1
Bit 15
Bit 5 Bit 0