Rockwell Automation 20-750-ENETR PowerFlexDual-Port EtherNet/IP Option Module - Manual (Page 191)

Rockwell Automation Publication 750COM-UM008A-EN-P - July 2012 191
Glossary
Explicit Messaging Explicit messages are used to transfer data that does not require continuous
updates. They are typically used to configure, monitor, and diagnose devices over
the network.
Fault Action A fault action determines how the option module and connected drive act when
a communication fault (for example, a cable is disconnected) occurs or when the
controller is switched out of run mode. The former uses a communication fault
action, and the latter uses an idle fault action.
Fault Configuration When communication is disrupted (for example, a cable is disconnected), the
option module and PowerFlex drive can respond with a user-defined fault
configuration. The user sets the data that is sent to the drive using specific fault
configuration parameters in the option module. When a fault action parameter is
set to use the fault configuration data and a fault occurs, the data from these
parameters is sent as the Logic Command, Reference, and/or Datalinks.
Gateway A device on a network that connects an individual network to a system of
networks. When a node needs to communicate with a node on another network,
a gateway transfers the data between the two networks. You need to configure the
address for the gateway device in the option module if you want the option
module to communicate with devices that are not on its network.
Hardware Address Each Ethernet device has a unique hardware address (sometimes called a MAC
address) that is 48 bits. The address appears as six digits separated by colons (for
example, xx:xx:xx:xx:xx:xx). Each digit has a value between 0 and 255 (0x00 and
0xFF). This address is assigned in the hardware and cannot be changed. It is
required to identify the device if you are using a BOOTP/DHCP server.
HIM (Human Interface Module) A device that can be used to configure and control a drive. The PowerFlex 20-
HIM-A6 or 20-HIM-C6S HIM can be used to configure PowerFlex 750-Series
drives and their connected peripherals.
Hold Last When communication is disrupted (for example, a cable is disconnected), the
option module and PowerFlex drive can respond by holding last. Hold last results
in the drive receiving the last data received via the network connection before the
disruption. If the drive was running and using the Reference from the option
module, it will continue to run at the same Reference.
Idle Action An idle action determines how the option module and connected drive act when
the controller is switched out of run mode.
I/O Data I/O data, sometimes called “implicit messages” or “input/output,” is time-critical
data such as a Logic Command and Reference. The terms “input” (To Net) and
“output” (From Net) are defined from the controller’s point of view. Output is
produced by the controller and consumed by the option module. Input is
produced by the option module and consumed by the controller.