Rockwell Automation 8720MC Drives Integration Manual - Manual (Page 45)

Publication 8720MC-IN002A-EN-P — December 2002
Commissioning Your 8720MC Analog Drive 2-13
The analog input assignments are fixed. In the SERCOS configuration,
the analog inputs are not available since the velocity or position
command is provided by the SERCOS fiber-optic ring. In their place a
second feedback channel is provided for spindle or axis mounted
feedback devices. In the SCANport configuration, the velocity or
torque reference is provided by a PLC
®
via a DeviceNet, Remote I/O,
or ControlNet connection to a SCANport communication bridge
module. Any of the analog output default links can be changed by
entering a new linkable parameter number into the analog output 1 or
2 (parameters 681 or 683).
Changing the Default Digital Output Links
If necessary, changing one or several default output assignments can
be accomplished by modifying the pointer or “link” values in the
digital output parameters (662 through 671). This may be
accomplished with DriveExplorer or the HIM module in “Program”
mode. In the tables below, entering the parameter number of the
“source” 8720MC I/O event into the “sink” 8720MC digital output
parameter will create a link between the 8720MC I/O event variable
and the digital output.
For example, assigning Digital Output 5 to the motor at “Zero_Speed”
variable can be accomplished by entering the value 331 into
parameter 666 using either DriveExplorer or the HIM in program
mode. The state of Digital Output 5 or any other digital output can be
observed using either DriveExplorer or the HIM in program mode by
selecting parameter 661, “Digital Output Status”. The status of all 10
digital outputs will be displayed as a bit array. A display of 1 is true
and 0 is false for each output. An x indicates an unused bit. Bit 5 will
be “1” whenever the motor falls within the zero speed window.
The state of the Zero_Speed variable can also be observed by
selecting parameter 331 using either DriveExplorer or the HIM in
program mode. It will indicate 1 for true and 0 for false.
If you change the digital output default assignments the 8720MC will
change parameter 501 to “Custom Configuration” so that it is clear that
this configuration has modified values which are different from the
default values.
If you use DriveExplorer to restore the defaults by selecting and
storing one of the application types in parameter 501, the modified
parameters will be changed back to the default values associated with
that application type. If you have a custom configuration,
DriveExplorer or the HIM can be used to identify parameters which
do not conform to the application defaults.