Rockwell Automation 8720MC Drives Integration Manual - Manual (Page 65)

Publication 8720MC-IN002A-EN-P — December 2002
Troubleshooting Your 8720MC Servo Drive 3-11
Bit 14 = Drive hardware - “Drv hardware”
Bit 15 = Motor overspeed - “Overspeed”
Troubleshooting the Digital
I/O In troubleshooting the digital I/O interface it is often necessary to
monitor the status of the digital and analog inputs and outputs to
determine the source of the problem. The following parameters can
be used for this purpose.
Parameter 666 - Digital Output Status
Bit 0 corresponds to Output 1 and bit 9 corresponds to Output 10. All
other bits are not used. Bits 0 to 9 will change from 0 to 1 when the
linked event variable comes true. Parameters 662 to 671 are used to
link the output to an internal event variable. Refer to the 8720MC
High Performance Drives Installation Manual (publication
8720MC-IN001x-EN-P) for the default links and the assignable event
links.
Parameter 690 - Digital Input Status
Figure 3.4 illustrates the digital input image display. Bit 0 corresponds
to Input 1 and bit 9 corresponds to Input 10. Bits 10 and 11 are the
registration inputs. All other bits are not used. Bits 0 to 11 will change
from 0 to 1 when the input comes true. The input variable
assignments are discussed in the 8720MC High Performance Drives
Installation Manual (publication 8720MC-IN001x-EN-P).
Figure 3.4
Input Image Display
I n p t u m a g e
x x x x 0
0 0 0 0 0 0 0
0 0 0
1
Bit 15
Bit 5 Bit 0
I