Novus Controller N2000S Manuel d'utilisateur télécharger pdf (Page 8)

Controller N2000S

NOVUS AUTOMATION

8/9

CALIBRATION

INPUT CALIBRATION

All input and output types are factory calibrated. Recalibration is not

recommended for operators with no experience. In case recalibration

of any scale is necessary, proceed as it follows:

a) Set up the input type to be calibrated

b) Set the lower and upper limits of extreme values for the input type

c) Apply a signal to the input that corresponds to a known value and

a little bit over the lower limit of the indication.

d) Access the “inLC

inLCinLC

inLC” parameter. By using the

and

keys

select the expected value that will appear in the parameters

display.

e) Apply a signal to the input that corresponds to a known value and

a little bit under the lower limit of the indication.

f) Access the “inLC

inLCinLC

inLC” parameter. By using the

and

keys

select the expected value that will appear in the parameters

display.

g) Repeat c to f up to no new adjustment is necessary.

Note: When the controller is calibrated, check if the required

excitation current of Pt100 is compliant to the Pt100 excitation

current used in this instrument. 0.17 mA.

ANALOG OUTPUT CALIBRATION

1. Configure I/O 5 for 11 (0-20 mA) or 12 (4-20 mA) values.

2. Connect a mA meter in the analog control output.

3. Disable auto-tune and soft-start.

4. Program the lower limit of MV in the “ovLL

ovLLovLL

ovLL” prompt with 0.0 %

and the upper limit of MV in the “ovxL”

ovxL”ovxL”

ovxL”with 100.0%.

5. Set “no

nono

no “ for the manual mode “avto

avtoavto

avto” prompt.

6. Enable the control (YES

YESYES

YES) at the “rvn

rvnrvn

rvn” prompt.

7. Program MV in 0.0 % in the operation cycle.

8. Select the “ovLC

ovLCovLC

ovLC’’ prompt.

Use the

and

keys to obtain the

0 mA (or 4 mA for type 12)

reading in the mA meter.

9. Program MV in 100.0 % in the operation cycle.

10. Select the “ovxC

ovxCovxC

ovxC” prompt. Use the

and

keys to obtain the

20 mA.

11. Repeat 7 to 10 up to no new adjustment is necessary.

POTENTIOMETER CALIBRATION

a) Set up the input type to be calibrated

b) Set the lower and upper limits of indication for the extremes of the

input type

c) Adjust the potentiometer with the minimum value.

d) Access the “PotL

PotLPotL

PotL” parameter. By using the

and

keys

select 0.0 in the parameters display.

e) Adjust the potentiometer with the maximum value.

f) Access the “Potk

PotkPotk

Potk” parameter. By using the

and

keys

select 100.0 in the parameters display.

g) Repeat c to f up to no new adjustment is necessary.

SERIAL COMMUNICATION

An optional master-slave RS485 serial communication interface is

available. It is used for communication with a supervisor machine

(master). The controller is always the slave.

Communication starts only with the master, which sends a command

to the slave address with which it wants to communicate. The slave

takes the command and sends the correspondent response to the

master.

The controller accepts also broadcast commands.

FEATURES

Signals compliant to the RS-485 standard. Two-wire connection

between the master and up to 31 instruments in bus topology (it may

address up to 247 instruments). Maximum cable length: 1,000

meters. Time to disconnect from the controller. Maximum 2ms after

the last byte.

Communication signals are electrically isolated from the rest of the

device, speed options are 1200, 2400, 4800, 9600 or 19200 bps.

Number of data bits: 8, without parity

Number of stop bits: 1

Time of response transmission start: Maximum 100ms after receiving

the command.

Protocol used: MODBUS (RTU), available in most market-available

supervisory software.

RS-485 signals are:

D1 = D: Bidirectional data line

D0 =

Inverted bidirectional data line

C = GND: Optional connection to improve communication

performance

COMMUNICATION PARAMETERS CONFIGURATION

Two parameters must be configured for serial use:

bavd

bavdbavd

bavd: Communication speed. All equipments with the same speed.

Addr

AddrAddr

Addr: Controller communication address. Each controller must

have an exclusive address.

PROBLEMS WITH THE CONTROLLER

Connection errors and inadequate programming are the most

common errors found during the controller operation. A final review

may avoid loss of time and damages.

The controller displays some messages to help the user identify

problems.

MESSAGE PROBLEM

----

--------

----

Open input. Without sensor or signal.

Err1

Err1Err1

Err1

Connection problems in the Pt100 cable

Other error messages displayed by the controller can account for

errors in the input connections or type of selected input non compliant

with the sensor or signal applied to the input. If errors persist, even

after a review, contact the manufacturer. Inform also the device serial

number. To find out the serial number, press

for more than 3

seconds.

The controller also has a visual alarm (the display flashes) when the

PV value is out of the range set by spxl

spxlspxl

spxl and spll

spllspll

spll.

ORDERING INFORMATION:

N2000S - 485 - 24V

A B C

A: Series model: N2000S

B: Digital communication: blank

485 (RS485, Modbus protocol)

C: Voltage rating: blank (100 to 240 Vac)

24V (24 Vdc/ac)

1 2 3 4 5 6 7 8 9

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Novus Controller N2000S Manuel d'utilisateur Page 8

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