User manual

286 Rockwell Automation Publication MOTION-UM003F-EN-P - March 2015
Glossary
Integrated Motion on the EtherNet/
IP network I/O Connection
The I/O connection is the periodic bidirectional, Class 1, CIP connection
between a controller and a drive that is defined as part of the Integrated Motion
on the EtherNet/IP network standard.
Integrated Motion on the EtherNet/
IP Network Drive
Refers to any drive device that complies with the CIP Motion standard.
Inverter An inverter is a device that generally converts DC input to AC output. An
Inverter is also commonly called the Drive Amplifier. In the context of a drive
system, the Inverter is responsible for controlling the application of DC Bus
power to an AC motor.
Motion Motion refers to any aspect of the dynamics of an axis. In the context of this
document, it is not limited to servo drives but encompasses all forms of drive
based motor control.
Motion Group A user defined grouping of motion axes. A motion group has configuration
parameters and status attributes that apply to all axes in the group.
Multiplexing Multiplexing is the method by which multiple signals are combined into one
signal for transmission.
Multiplex Update Multiplier Number of multiplexed drives that determines the multiplex update period.
Multiplex Update Period Task update period for a Multiplexed Axis.
Open Loop Open loop is a method of control where there is no application of feedback to
force the actual motor dynamics to match the commanded dynamics. Examples
of open loop control are stepper drives and variable frequency drives.
Safe Torque Off The Safe Torque Off (STO) feature provides a method, with sufficiently low
probability of failure, to force the power-transistor control signals to a disabled
state. When the command to allow torque ceases from the GuardLogix
controller, all of the drive output-power transistors are released from the On-
state.
For complete information about the Safe Torque Off feature, see the Kinetix
Multi-axis servo EtherNet/IP drive User Manual, publication 2198-UM002
.
Service Data Block The service data block is a lower priority real-time data block associated with a
service message from the controller that is transferred by an Integrated Motion
on the EtherNet/IP network connection on a periodic basis. Service data
includes service request messages to access attributes, run a drive-based motion
planner, or perform various drive diagnostics.
Set/Write A Set/Write involves setting an attribute to a specified value from the perspective
of the Controller side of the interface.
Shunt Regulator A shunt regulator is a specific Bus Regulator method that switches the DC Bus
across a power dissipating resistor to dissipate the regenerative power of a
decelerating motor.