Scaime eNod3-C, Инструкция пользователя

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e Nod3- C
Digital Transmitter
e Nod3- C :
User’s instructions
NU-eNod3C-E-0911_165702-I
17/22
10 TRANSMITTER OPERATING MODE:
This basic operating mode consists of transmitting measurements on the bus, possibly after
configuring them, filtering them and comparing them with set-points levels.
Measurements can be transmitted individually regardless of the communication protocol or
continuously at a defined period in the
SCMBus
(standard or fast format) and
CANopen®
protocols
.
Functioning may be unipolar (positive analog signal only) or bipolar (positive or negative
analog signal).
10.1 Measurement reading request:
10.1.1 Single measurement transmission:
Regardless of the communication protocol in use.
The request can apply to:
-
gross measurement.
-
net measurement.
-
tare value.
-
measurement in A/D converter points.
10.1.2 Continuous measurement transmission:
This is possible using
standard or fast SCMBus format ,
the transmission can be started by a
serial command and another one allows stopping it. Measurements are transmitted at a period
defined in ms by the
‘sampling period’
setting.
The request can apply to:
-
gross measurement.
-
net measurement.
-
measurement in A/D converter points.
Note: This is very similar to operation of the
‘Measurement window’
through an input command.
CANopen®
protocol also allows defining a period at which measurements are sent on the bus
without any master request.
10.2 Specific commands through an input:
10.2.1 Transmit measurement (fig. 4)
This is only possible using
standard or fast SCMBus
format
or
CANopen®
protocols.
The request can apply to:
-
gross measurement.
-
net measurement.
-
measurement in A/D converter points.
A single measurement is transmitted per rising or falling edge
(depending on the configured logic) on the input signal.
10.2.2 Measurement window (fig.5)
This is only possible using
standard or fast SCMBus
.
The request can apply to :
-
gross measurement.
-
net measurement.
-
measurement in A/D counts.
While the input is kept at the right level, a series of measurements
are transmitted at the period defined by the
‘sampling period’
setting.Only input 2 is operational if both inputs are assigned to
this function.
10.2.3 Clear
Cancels current tare (same functioning as
‘cancel tare’
command).
11 CHECKWEIGHER OPERATING MODE:
Lo
a
d
t
input
Measur.
Fig. 4
Fig. 5
Load
t
input
output
period
Measur.