116 JVL Industri Elektronik A/S - User Manual - Ethernet for MAC and MIS motors
5.1 Introduction to POWERLINK
5.1.2 Abbreviations
Following general used terms are useful to know before reading the following chapters.
100Base-Tx 100 MBit Ethernet on twisted pairs
ASnd Asynchronous Send (POWERLINK frame type)
CAN Controller Area Network
CANopen Application layer protocol used in automation.
CN Controlled Node (slave on Ethernet Powerlink network)
EN Exception New (flag in POWERLINK frame)
EMCY Emergency Object.
EPL Ethernet PowerLink
EPSG Ethernet PowerLink Standardisation Group
ID Identifier
IP Internet Protocol - IP address ~ the logical address of the device, which is
user configurable.
MAC Media Access Controller - MAC address ~ the hardware address of the de-
vice.
MacTalk A windows PC based program supplied from JVL. This is an overall program
to install, adjust and monitor the function of the motor and a module in
-
stalled in the motor.
MN Managing Node (master on Ethernet Powerlink network)
NAT Network Address Translation (used in EPL router, to reach destinations
outside EPL segment)
NMT Network Management
PDO Process Data Object (for cyclic data)
PReq Poll Request. A frame used in the isochronous phase of the cyclic commu-
nication. With Poll Request, the MN requests the CN to send its data.
PRes Poll Response. A frame used in the isochronous phase of the cyclic commu-
nication. The CN responses with a Poll Response frame when it receives a
Poll Request from the MN.
SCNM Slot Communication Network Management; In a POWERLINK network,
the MN allocates data transfer time for data from each node in a cyclic man
-
ner within a guaranteed cycle time. Within each cycle there are slots for
Isochronous Data, and for Asynchronous Data for ad-hoc communication.
The SCNM mechanism ensures that there are no collisions during physical
network access in any of the net worked nodes thus it provides determin
-
istic communication via Legacy Ethernet.
SDO Service Data Object (for acyclic data)
SoA Start of Asynchronous (POWERLINK frame type)
SoC Start of Cyclic (POWERLINK frame type)
TCP Transfer Control Protocol (an IP based protocol used widely on the inter-
net)
UDP User Datagram (an IP based protocol used widely on the internet)
XDD File extension for the device description file.
XML Extensible Markup Language - used for the device description file.
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