User manual

Rockwell Automation Publication MOTION-UM003F-EN-P - March 2015 287
Glossary
Synchronized Synchronized is a condition where the local clock value on the drive is locked
onto the master clock of the distributed System Time. When synchronized, the
drive and controller devices can use time stamps that are associated with an
Integrated Motion on the EtherNet/IP network connection data.
System Time System time is the absolute time value as defined in the CIP Sync standard in the
context of a distributed time system where all devices have a local clock that is
synchronized with a common master clock. In the context of Integrated Motion
on the EtherNet/IP network, System Time is a 64-bit integer value in units of
microseconds or nanoseconds with a value of 0 corresponding to January 1, 1970.
Time Offset Time offset is the System Time Offset value associated with the Integrated
Motion on the EtherNet/IP network connection data that is associated with the
source device. The System Time Offset is a 64-bit offset value that is added to a
device’s local clock to generate System Time for that device.
Time Stamp Time stamp is a system time stamp value that is associated with the Integrated
Motion on the EtherNet/IP network connection data. The time stamp conveys
the absolute time when the associated data was captured, or can be also used to
determine when associated data is applied.
Variable Frequency Drive (VFD) Variable Frequency Drive (VFD) is a class of drive products that seek to control
the speed of a motor, typically an induction motor, through a proportional
relationship between drive output voltage and commanded output frequency.
Frequency drives are, therefore, sometimes referred to as Volts/Hertz drives.
Vector Drive Vector drive is a class of drive products that seek to control the dynamics of a
motor via closed loop control, which includes, but is not limited to, closed loop
control of both torque and flux vector components of the motor stator current
relative to the rotor flux vector.
TIP
The Kinetix 350 drive does not support the Output Frequency attribute.