Scaime eNod3-D User manual

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eNod3-D: User’s instructions 165 752-A1/23
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User’s instructions

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eNod3-D: User’s instructions 165 752-A2/23
1GENERAL PRESENTATION :..............................................................................4
1.1 Dimensions :.................................................................................................................................... 4
1.2 General characteristics :.................................................................................................................. 5
2INTERFACES : .....................................................................................................6
2.1 Connection to power supply : .......................................................................................................... 6
2.2 Connection to load cell(s) :.............................................................................................................. 6
2.3 Connection of inputs and outputs :.................................................................................................. 7
2.3.1 Digital inputs...........................................................................................................................7
2.3.2 Digital outputs.........................................................................................................................7
3COMMUNICATION INTERFACES : .....................................................................8
4COMMUNICATION : .............................................................................................9
4.1 ModBus RTU : ................................................................................................................................. 9
4.2 SCMBus :......................................................................................................................................... 9
4.2.1 Fast SCMBus format :............................................................................................................9
4.3 CANopen : ....................................................................................................................................... 9
5CALIBRATION :..................................................................................................10
5.1 Calibration types :.......................................................................................................................... 10
5.2 Non-linearity correction.................................................................................................................. 10
6INPUTS FUNCTIONING : ...................................................................................11
6.1 Inputs assignement :...................................................................................................................... 11
6.2 Functions independant of the functioning mode :..........................................................................11
6.3 Functions specific to each functioning mode :...............................................................................11
7OUTPUTS FUNCTIONING : ...............................................................................12
7.1 Outputs assignement :................................................................................................................... 12
7.2 Functions independant of the functioning mode :..........................................................................12
7.3 Functions specific to each functioning mode :...............................................................................12
7.4 Feeding mode in dosing processes............................................................................................... 13
8SET POINTS :.....................................................................................................13
9FILTERS : ...........................................................................................................13
10 TRANSMITTER FUNCTIONING MODE :...........................................................14
10.1 Measurement reading request :..................................................................................................... 14
10.1.1 Single measurement transmission :.....................................................................................14
10.1.2 Continuous measurement transmission...............................................................................14
10.2 Specific commands through an input :...........................................................................................14
10.2.1 Transmit measurement (Fig. 4)............................................................................................14
10.2.2 Measurement window (Fig. 5)..............................................................................................15
10.2.3 Clear.....................................................................................................................................15
11 DOSING BY FILLING FUNCTIONING MODE :..................................................16
11.1 Starting conditions ......................................................................................................................... 17
11.2 Cycle description............................................................................................................................ 18
11.2.1 Flow rate control (optional)...................................................................................................18
11.2.2 Automatic taring at start .......................................................................................................18
11.2.3 Coarse feed effect neutralization time..................................................................................18
11.2.4 Fine feed level......................................................................................................................18
11.2.5 Fine feed effect neutralization time......................................................................................18
11.2.6 Target weight and inflight weight..........................................................................................19
11.2.7 Final stabilization time..........................................................................................................19
11.2.8 Tolerances............................................................................................................................19
11.2.9 End of emptying level and emptying holding time................................................................19
11.2.10 End of cycle waiting time......................................................................................................19
11.2.11 Effective end of cycle............................................................................................................19
11.3 Digital inputs utilization .................................................................................................................. 19
11.3.1 Start cycle.............................................................................................................................19
11.3.2 Suspend current cycle..........................................................................................................19
11.3.3 Stop cycle.............................................................................................................................20
12 DOSING BY UNLOADING FUNCTIONING MODE :..........................................20
12.1 Reloading management................................................................................................................. 22

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12.1.1
Reloading at the end of the cycle.........................................................................................22
12.1.2 Reloading at the start of the cycle........................................................................................22
12.2 Cycle description............................................................................................................................ 22
12.2.1 Flow rate control (optional)...................................................................................................22
12.2.2 Verification of the available product quantity........................................................................22
12.2.3 Start delay ............................................................................................................................22
12.2.4 Coarse feed effect neutralization time..................................................................................22
12.2.5 Fine feed level......................................................................................................................22
12.2.6 Fine feed effect neutralization time......................................................................................22
12.2.7 Target weight and inflight weight..........................................................................................23
12.2.8 Final stabilization time..........................................................................................................23
12.2.9 Tolerances............................................................................................................................23
12.2.10 End of cycle waiting time......................................................................................................23
12.2.11 Effective end of the cycle .....................................................................................................23
12.3 Digital inputs utilization .................................................................................................................. 23
12.3.1 Start cycle.............................................................................................................................23
12.3.2 Suspend current cycle..........................................................................................................23
12.3.3 Stop cycle.............................................................................................................................23

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eNod3-D: User’s instructions 165 752-A4/23
1 GENERAL PRESENTATION :
eNod3-Dprovides an economic high performance solution to transform any strain gauge sensor into an
intelligent digital system. eNod3-Dincludes three advanced operating modes for control of static and
dynamic processes :
- measurements transmitter
- dosing by filling
- dosing by unloading
eNod3-Dis equiped with RS485/422, RS232 and CANbus outputs supporting ModBus-RTU, SCMBus
and CANopen protocols. Each module is also provided with 2 digital inputs and 4 digital outputs,
authorizing synchronization of functions with automation and alarm management.
SCAIME provides the eNodView software to facilitate installation of eNod3-Dto set parameters and
calibrate the measurement system, for acquisition of measurements and simulation of digital filters.
1.1 Dimensions :
Single board card
Waterproof
housing version
DIN rail version

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1.2 General characteristics :
Power supply
power supply voltage 10 ..... 28 V
DC
max consumption 70 with 350Ωload cell
120 with 80Ωload cell mA
Temperature range
storage temperature -25...+85 °C
operating temperature -10...+40 °C
Load cell
impedance (complete bridge) > 80 Ω
connection 4 or 6 wires
load cell power supply 5 ± 5% V
DC
Communication
RS 485/422 and RS232 Half or full-duplex
RS baud rate 9600 ... 115200 bauds
Can 2.0A 20....1000 kbauds
Logical inputs
number 2
type optocoupler
low-level voltage 0 ..... 3 V
DC
high-level voltage 9 .... 28 V
DC
current at high level 10mA @ 24V mA
insulation voltage 2500 V
rms
Logical outputs
number 4
type opto-insulated static relays
max current @ 40°C 0.4 A
max voltage in open state 55 V
resistance in ON state 2 Ω
insulation voltage 2500 V
rms
Metrological characteristics
analog input signal range 7.8 ... 500 mV/V
typical temperature offset drift
@ input signal range <7,8 mV/V 1.5 ppm/°C
typical slope temperature effect 2 ppm/°C
max linearity error 0.003 %
A/D conversion rate 1920 .... 6.25 meas./s
Programmable functions
acquisition of zero, taring, zero tracking
physical or theoretical calibration
slope correction
non-linearity polynomial correction
low-pass, band-stop and self-adaptive digital filters
set points (up to 4) management
dosing (by filling or by unloading) processes control

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2 INTERFACES :
2.1 Connection to power supply :
The ‘POWER’ light on the board shows wheter or not the power supply is correctly connected.
2.2 Connection to load cell(s) :
eNod3-Dsupplies power to the load cells (5 V
DC
).
Up to four 350Ωload cells can be connected in parallel.
eNod3-D allows the use of 4- or 6- wire load cells.
- 4-wire load cells : jumpers in place
- 6-wire load cells : jumpers removed
Power supply
10 to 28V DC
PWR
+
PWR
REF
POWER
_
+
2
1
4/6- wire jumpers
ON
: 4 wires
OFF : 6 wires
Exc+
Sens+
Exc-
Sens-
Sig+
Sig-
Shield
1
2
3
4
5
6
7

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2.3 Connection of inputs and outputs :
2.3.1 Digital inputs
 connection to a detector :
 connection to a push button (PB) :
2.3.2 Digital outputs
Opto-insulated inputs characteristics
high level 9 to 28V
DC
– Consumption : 10mA @ 24VDC
low level 0 to 3 V
DC
Opto-insulated outputs characteristics
max currect @ 40°C 0.4 A
max voltage in open state 55 V
resistance in the ON state 2 Ω
insulation voltage 2500 V
rms
OUT 4
OUT 3
OUT 2
OUT 1
OUT
COM
IN 2 –
IN 2 +
IN 1 –
IN 1 +
1
8
9
7
6
5
4
3
2

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A light is assgined to each output.
3 COMMUNICATION INTERFACES :
eNod3-D is capable of communicating with an automatic control for each connection :
- RS485 / 422
- RS232
- CAN
The connection to the RS 485 / RS 422 interface is made through TA, TB and RA, RB connections on the 9-pins
connector. (TA = direct transmission, TB = inverse transmission, RA = direct reception, RB = inverse reception).
For an RS485 (half duplex) communication, just connect the TB and TA pins and remove the corresponding jumper
(OFF).
For an RS422 or RS485 full-duplex communication, use the four TB, TA, RB and RA pins. The corresponding jumper
must be in place (ON) (which is the default case on delivery).
The RS232 interface is connected using Tx, Rx and REF connections on the 9-pin connector.
CAN/RS jumper ON
CAN/RS jumper OFF
RS485 jumper
ON : Full duplex
OFF : Half duplex
CAN / RS jumper
ON : RS
OFF : CAN
TB
TA
RB
RA
Rx
TX
REF
CANL
CANH
RS232
CAN
RS485
Half/Full
communication
9
7
6
5
4
3
2
1
8
+
-
55 V
DC
max
OUT
COM
OUT
Load
+
-
55 V
DC
max
OUT
COM
OUT
Load
OUT
COM
OUT
Load
38 V
AC
max

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The CAN interface is connected using the CANH, CANL and REF (not mandatory) connections on the 9-pin
connector.
4 COMMUNICATION :
eNod3-D can communicate using several protocols :
- ModBus RTU
- SCMBus standard format or fast format.
- CANopen
 Switching from the SCMBus protocol to the ModBus-RTU protocol (and reciprocally) can be done
by software programmation.
1) send the corresponding command
2) send the ‘storage in EEPROM’ command
3) reset (hardware or software)the device
See example describing how to switch from ModBus-RTU to SCMBus protocol in the document
SCMBUS communication Ref 165 756 Appendix A.
 Switching from SCMBus/ModBus-RTU protocol to CANopen protocol (and reciprocally) can be
done by setting or removing the appropriate jumper (cf. §3) then by making a reset
4.1 ModBus RTU :
See the descritption of the different communication frames in the document : ModBus-RTU
communication Ref. 165754
4.2 SCMBus :
See the descritption of the different communication frames in the document : SCMBus communication
Ref. 165756.
The SCMBus protocol has got similarities with ModBus-TU. It is based on the master/slave structure
however it allows to transmit measurements continuously without collision management on the line. This
operating mode is only available in transmitter functioning mode.
The measurements transmission frequency depends on the serial baud rate thus transmitting 100 meas/s
is impossible at less than 19200 bauds. For fast measurement transmissions, use the fast SCMBus
format with wich 1200 meas/s can be expected at 115200 bauds.
Other methods of transmitting information without any master request :
- transmitter mode : measurement transmission triggered by a digital input.
- whatever the functioning mode is, physical calibration procedure : automatic transmission when
a step in the process is complete.
4.2.1 Fast SCMBus format :
The fast SCMBus format is particularly useful for measurement acquisition at the highest rate, for
example in order to analyze dynamic phenomena. This format should only be used for point-to-point
opreation in full-duplex.
So as to optimize the speed, in addition to using the fast SCMBus format, it is preferable to configure
eNod3-D in ‘non-processing transmitter’. In his operating mode, filters are disabled, set points are not
managed and there is no polynomial linearization.
4.3 CANopen :
eNod3-D supports CANopen communication protocol and is compliant with ‘CiA Draft Standard V301’.
Refer to the decription note : CANopen communication Ref. 165758.

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5 CALIBRATION :
5.1 Calibration types :
There are different possible calibration types (see examples in the documents : communication
SCMBus Réf. 165 756’ Appendix A and communication ModBus RTU Réf. 165 754 Appendix A) :
 Physical calibration using known references on the load cell. This type of calibration can be done
with 1, 2 or 3 known loads.
 Theoretical adjustment by setting the load cell sensitivity and a corresponding capacity.
 Correction of the initial calibration value with a coefficient.
5.2 Non-linearity correction
For an installation with a non-linearity :
The linearization formula is as follows
The three A, B and C coefficients can be determined using eNodView software.
Corrected measurement = Meas – A (Meas)
2
– B(Meas) – C
where Meas = current measurement
Fig. 1