| Boot
Image |
A
node binary image that contains just enough information for the SynqNet
controller to identify and communicate with the connected node(s)
on a SynqNet network. Boot image should be preloaded on node. See
run-time image. |
| Cat
5 |
Category
5, specification for twisted cables (5e is enhanced). |
| Control
latency |
The
network latency plus internal delays within a node. |
| Controller |
The
Motion controller and SynqNet network host, there should only be one
controller per network. |
| CRC |
Cyclic
Redundancy Check. See CRC Error Counter. |
| Data
Class |
All
SynqNet data falls into one of two classes: cyclic or service |
| Data
Type |
On
each node, cyclic data is mapped to logic modules based on dataType. |
| Downstream |
From
the controller to a node. Usually refers to the direction of the data
flow. |
| DP |
Drive
Processor |
| Drive
Processor |
Digital
signal processor or other processor responsible for controlling the
motor currents. |
| Drive_Mode |
Specifies
the operational mode of the drive e.g. torque / braking etc. |
| Dual
String |
A
topology which consists of two String networks connected to one controller.
This topology is currently unsupported. |
| Earth |
Ground
|
| EFT |
Electrical
Fast Transients |
| ESD |
End
of Stream Delimiter (IEEE802.3) |
| Farthest
node |
The
node that is located the furthest down on the network from the controller.
It is also the node that is connected to the redundant link in a Ring
topology. |
| Fault |
A
'fault' prevents a drive from working. |
| FDDI |
Fiber
Distributed Data Interface |
| Ground |
Earth
|
| Little-endian
|
Memory
organizations where, within a given 16- or 32-bit word, bytes at lower
addresses have lower significance (the word is stored "little-end-first").
|
| MAC |
Medium
Access Controller (see SynqNet MAC) |
| Message |
The
unit of communication inbetween the SQNL and the Drive Processor. |
| MII |
Media
Independent Interface (IEEE802.3: connects PHY to MAC devices) |
| Motion
Block |
A
set of hardware functions relating to motion control such as an encoder
counter, capture, and compare functions, pulse generators and so forth.
|
| Network
latency |
The
sum of the time taken to (1) send the feedback data to the controller
over SynqNet, (2) manipulate the data at the controller, (3) and send
the demand data to the node over SynqNet. |
| Network
Phase |
The
mode of operation of SynqNet, determined by the controller. |
| Node |
Means
'slave node' and not the controller, unless otherwise stated. |
| Node
State |
Internal
SynqNet state of one given node in the network. Determines the basic
behavior allowed for the node. |
| Packet |
The
unit of communication in SynqNetT |
| PDO |
A
CAN message that contains operational data. |
| PHY |
Physical
Layer Interface: a device that translates 100BT signals into 4 bit
MII interface data. |
| PLL |
Phase
Locked Loop |
| Port
energized |
The
receive PHY in a port is in receipt of valid symbols. |
| PRBS |
Pseudo
Random Binary Sequence |
| PSU |
Power
Supply Unit |
| Quadlet |
A
32-bit word (from IEEE 1394) |
| Receive
port |
The
port selected at a node to receive the command packets, whichis is
normally the IN port. |
| Redundant
link |
In
a Ring topology only: a point-to-point link that is not used to carry
normal operational traffic, it is usually the link connected to the
controller's IN port. |
| Remote
Motion Block |
A
SynqNet node that can be connected to a drive that has a +/-10V or
pulse control interface. |
| Ring |
The
standard SynqNet topology |
| Ring
of Rings |
A
topology which consists of two Ring networks connected to one controller.
This topology is currently unsupported. |
| RMB |
Remote
Motion Block |
| Run-time
Image |
A
node binary image contains the logic for full operation of the node
on a SynqNet network. The run-time image needs to be manually downloaded.
See boot image. |
| Screen |
Shield
|
| Shield |
Screen |
| SMI |
Serial
management interface (part of the MII) |
|
SMPS
|
Switch
Mode Power Supply |
| SQNL |
SynqNet
Node Logic. |
| SSD |
Start
of Stream Delimiter (IEEE802.3) |
| STP |
Shielded
Twisted Pair |
| String |
An
alternative to the Ring topology without the redundant link. |
| Synq_Cycle |
One
SynqNet cycle consists of one downstream cycle and one upstream cycle,
in which packets are sent/received across the network by the controller
and the connected node(s). |
| SYNQ
packet |
The
SynqNetT packet that is used as a network timing reference. |
| Synq_Rate |
The
rate of cyclic communication over SynqNetT. |
| SynqNet |
MEI's
motion control network that is specifically designed for high-speed
cyclic messaging in high performance motion control applications. |
| SynqNet
MAC |
Medium
Access Controller: Standard data link layer logic function in all
nodes. Translates MII signals from PHY into internal module bus. |
| SynqNet
Node Logic |
A
digital logic circuit (located in a node) that implements both SynqNet
MAC and Motion Block functions. May be supplied either as an FPGA
or as an ASIC. |
| SynqNetT |
A
100Mbit, full-duplex motion control network devised by MEI. |
| Tree |
A
topology which consists of a combination of Ring and String networks
connected to one controller. This topology is currently unsupported. |
| Upstream |
From
the node to the controller . Usually refers to the direction of the
data flow. |
| UTP |
Unshielded
Twisted Pair |
| Warning |
A
'warning' is an indication that a drive, though operational, is likely
to exhibit a fault soon. |
