NOVUS N1540 Indicator - Manual

N1540 Indicator
Registers Table
1.1 SERIAL COMMUNICATION
The optional serial interface RS485 allows to address up to 247 indicators in
a network communicating remotely with a host computer or master indicator.
RS485 Interface
• Compatible line signals with RS485 standard.
• 3 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.
D0 = D: Bidirectional inverted data line.
C = GND: Optional connection which left communication better.
General Characteristics
• Optically isolated serial interface.
• Programmable baud rate: 1200, 2400, 4800, 9600, 19200, 38400,
57600 and 115200 bps.
• Data Bits: 8
• Parity: None, Even or Odd.
• 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 available Modbus commands are:
03 - Read Holding Register
05 - Force Single Coil
06 - Preset Single Register
16 - Preset Multiple Register
The registers are arranged in a table in such a way that several registers can
be read in the same request.
1.2 CONFIGURATION OF SERIAL COMMUNICATION
PARAMETERS
Three parameters must be configured in the device for serial communication:
bavd : Baud rate. All devices with same baud rate.
addr : Device communication address. Each device must have an
exclusive address.
Prty : Parity.
1.3 CONNECTIONS
1.4 REGISTERS TABLE
Equivalent to the holding registers (referenced as 4X).
The holding 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
Registers Parameter
Register Description
0000
ALrf
Differential alarm reference.
Maximum range: SPLL to SPkL (or the sensor
span)
0001 PV
Read: Process Variable.
Write: Not allowed.
In case of temperature reading, the value read
is always multiplied by 10, independently of
dppo
value.
0002 Reserved Internal use
0003 Reserved Internal use
0004
Display
Value
Read: Current value shown on display.
Write: Current value shown on display.
Range: -2000 to 30000. The range depends on
the displayed parameter.
0005
Prompt
index
Read: Current prompt position in the parameters
flowchart.
Write: no allowed. Range: 0000h to 060Ch
Prompt number format: XXYYh, where:
XX→ menu cycle number
YY→ prompt number
0006 Status Word
1
Read: Status bits.
Write: no allowed.
Valor lido: See Table 2.
0007
Software
Version
Read: The firmware version of indicator. If
V1.00, the read value will be 100.
Write: not allowed.
0008 ID
Read: indicator identification number: 69
Write: not allowed.
0009 Status Word
2
Read: Status bits. See Table 2.
Write: no allowed.
0010 Status Word
3
Read: Status bits. See Table 2.
Write: no allowed.
0011~0015 Reserved Internal use
0016 Freq
Read/Write: Mains frequency.
Range: 0 – 1 (60/50Hz)
0017 Reserved
0018
FLtr
Read/Write: PV digital filter gain.
Range: 0 – 20
0019 Reserved Internal use
0020 SP1.E
Controls the presence of the parameter SPA1 in
the indicator operation cycle.
0→ Disables;
1→ Enables;
0021 SP2.E
Controls the presence of the parameter Alarm 2
in the indicator operation cycle.
0→ Disables;
1→ Enables;
0022 Reserved Internal use
0023
Serial
number H
Serial number first four digits.
Range: 0 to 9999. Read only.
0024
Serial
number L
Serial number last four digits.
Range: 0 to 9999. Read only.
0025 Reserved Internal use
0026 i NLL
Defines the minimum PV indication value for
analog input types (used to scale the analog
inputs).