13. Glossary
Temposonics
®
R-Series
V
POWERLINK
Operation Manual
I 62 I
C
CAM
Cam position of a CAM channel in a cam gear. Each CAM position can
be confi gured separately. With R-Series
V
POWERLINK, for each po-
sition magnet there is one CAM channel. Each CAM channel supports
up to four CAM positions.
Controlled Node (CN)
All devices in the network, except the Managing Node, are
C
ontrolled
N
odes (CN). The Controlled Nodes may send their data only after be-
ing requested by the Managing Node. The R-Series
V
POWERLINK
can only be used as a Controlled Node. (
Managing Node)
E
Extrapolation
The native measurement cycle time of a sensor increases with the
stroke length. With extrapolation, the sensor is able to report data
faster than the native cycle time, independent of the stroke length of
the sensor. Without extrapolation, if data is requested faster than the
native cycle time, the last measured value is repeated.
F
FIR Filter
The FIR fi lter (
F
inite
I
mpulse
R
esponse) is used to smooth the mea-
sured position value before output. To determine the output value,
only input values corresponding to the window (fi lter window size)
are used for fi lter calculation. The output value is calculated from
these input values in form of a moving average value. (
IIR Filter)
I
I/O Mapping
I/O mapping is used to confi gure the cyclical data that is transferred
between sensor and controller. The assignment of the inputs (
I
N)
and outputs (
O
UT) is done from the perspective of the controller.
Cyclical data from the sensor to the controller are, for example, the
position and the velocity.
IIR Filter
The IIR fi lter (
I
nfi nite
I
mpulse
R
esponse) is used to smooth the
measured position value before output. To determine the outputvalue,
the input values corresponding to the fi lter grade (fi lter window size)
are used for the fi lter calculation. The previous values are also taken
into account when calculating the output value. (
FIR Filter)
Internal Linearization
The internal linearization offers an improved linearity for an overall
higher accuracy of the position measurement. The internal lineariza-
tion is set for the sensor during production.
M
Managing Node (MN)
The
M
anaging
N
ode (MN), usually an industrial PC or a PLC, con-
trols the communication in the network as master and sets the clock
for the synchronization of all devices. In a network there is only one
Managing Node. All other devices of the POWERLINK network are
Controlled Nodes. (
Controlled Node)
Measuring direction
When moving the position magnet, the position and velocity values in-
crease in the measuring direction.
• Forward: Values increasing from sensor electronics housing
to rod end/profi le end
• Reverse: Values decreasing from sensor electronics housing
to rod end/profi le end
Multi-position measurement
During the measurement cycle, the positions of every magnet on
the sensor are simultaneously reported. The velocity is continuously
calculated based on these changing position values as the magnets
are moved.
N
Node ID
The addressing of the devices in a POWERLINK network is done via
the node ID. Each node ID only exists once in a network. It can have
a value between 1 and 240 (while 240 is reserved for the Managing
Node). Meaning that a POWERLINK network can comprise up to 240
devices. With the R-Series
V
POWERLINK, the node ID (delivered with
node ID 1) can be set via the TempoLink
®
smart assistant, for example.
O
Offset
A value which will be added or deducted to the actual position value.
This leads to a shift of the measurement range start. (
Preset)
P
POWERLINK
POWERLINK is an Industrial Ethernet interface and is managed by
the
E
thernet
P
OWERLINK
S
tandardization
G
roup (EPSG).
The R-Series
V
POWERLINK and its corresponding XDD fi le are
certitifi ed by the EPSG.
PLC
A PLC (
P
rogrammable
L
ogic
C
ontroller) is a device for controlling or
regulating machines and systems.
Preset
With the preset, a value is entered for the current position which is
to be output at this position in the future. The difference between the
entered value and the currently measured position is calculated as an
offset. (
Offset)
R
RO
RO (
R
ead
O
nly) means that the value of the variable can only be read
but is not modifi able.
RW
RW (
R
ead/
W
rite) means that the value of the variable can be read
and written. The value of the variable is modifi able.