Estudiante

0005

Prompt
index

0006

Status
Word 1
Software
Version

N1100/N2000/N3000
Communication Protocol – V2.0x
1. SERIAL COMMUNICATION
1.1

COMMUNICATION INTERFACE

0007

The optional serial interface RS485 allows to address up to 247 controllers in a
network communicating remotely with a host computer or master controller.

0008

ID

0009

Status
Word 2
Status
Word 3RS485 Interface
•
•

Compatible line signals with RS485 standard
2 wire connection from master to up to 31 slaves indicators in a multidrop bus. It
is possible address 247 nodes with multiple outputs converters.
Maximum communication distance: 1000 meters
The RS485 signals are:
D1 = D:
Bidirectional data line.
Bidirectional inverted data line.
D0 = D:
C = GND:
Optional connectionwhich left communication better.

•
•

0010
0011

Ir
Ir

General Characteristics

0012

•
•
•
•
•

0013

dt
dt
pb
pb

0014
0015

ct
ct

0016
0017

kyst
kyst

0018
0019

ovll
ovll

0020

ovkl
ovkl

0021

AvEn
AvEn

0022

f
f..fvnc

Two parameters must be configured in the device for serial communication:

0023

bavd
bavd:
addraddr:

Baud rate. All devices with same baud rate.

0024

Device communication address. Each device must have an exclusive
address.

0025

Serial
number H
Serial
number L
SV

0026

spll
spll

0027

spkl
spkl

0028

Manual
MV

0029

offs
offs

0030

dppo
dppo

0031

Sp.
Sp.a1

0032

Sp.
Sp.a2
Sp.
Sp.a3
Sp.a4
Sp.
Fva1
Fva1

Optically isolatedserial interface
Programmable baud rate: 1200, 2400, 4800, 9600 or 19200bps.
Data Bits: 8
Parity: None
Stop Bits: 1

Communication Protocol
The MOSBUS RTU slave is implemented, available in most SCADA softwares in the
market.
All configurable parameters can be accessed (for reading or writing) through the
Registers Table. Broadcast commands are supported as well (address 0).
The availableModbus commands are:
03 - Read Holding Register

-

-

-

05 - Force Single Coil (Force Digital Output state)
06 - Preset Single Register
The registers are arranged in a table in such a way that several registers can be
read in the same request.
1.2

1.3

CONFIGURATION OF SERIAL COMMUNICATION PARAMETERS

REGISTERS TABLE

Equivalent to the registers referenced as 4XXXX.

Theholding registers are basically a list of the internal indicator parameters. All
registers above address 12 can be read or written. The registers up to this address
in more are read only. Please verify each case. Each table parameter is a 16 bits
two complement signed word.
Holding

Parameter

Register Description

Registers

0000

0001

0002

0003
0004

Active
SV

PVMV

Display
value

Read: Active control SV (main SV, from ramp and soak or
from remote SV).
Write: to main SV
Range: from spll to spkl.
spll spkl
Read: Process Variable
Write: not allowed.
Range: From spll to spkl. The dppo prompt gives the
spll
spkl.
dppo
decimal point position.
Read: Output Power in automatic or manual mode.
Write: not allowed. See address 29.
Range: 0 to 1000(0.0 to 100.0%).
Reserved.
Read: Current value shown on display.
Write: Current value shown on display.
Range: -1999 to 9999. The range depends on the displayed
parameter.

0033
0034
0035

0036
0037
0038
0039
0040
0041
0042

1

Fva2
Fva2
Fva3
Fva3
Fva4
Fva4
Kya1
Kya1
Kya2
Kya2
Kya3
Kya3
Kya4
Kya4

Read: Current prompt position in the parameters flowchart.Write: not allowed.
Range: 0000h to 060Ch
Prompt number format: XXYYh, where:
XX→menu cycle number (see operation manual)
YY→prompt number (index).
Read: Status bits. See table 2
Write: not allowed.
Read: The firmware version of controller. If V1.00, the read
value will be 100.
Write: not allowed.
Read: controller identification number.
Write: not allowed.
Values:
1 – N1100; 2 - N2000; 3...