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  2. Novus
  3. N3000

Novus N3000 Modbus register map

Universal PID process controller with ramp and soak, four alarms, analog output and optional RS485 Modbus RTU: PV, setpoints, output power, status, PID, input, alarms, I/O and serial settings

  • Official
  • 113 registers
  • Modbus RTU
  • Revision 1 · 2026-10-31
  • Identity: model, firmware

Official: Written from the manufacturer's documentation, but not tested on a device yet. Check the map against the manufacturer's documentation before you write to a live device. Tested it? Report a test.

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Communication

Protocol
Modbus RTU
Unit ID
1
Serial
9600 8N1 · 9600 baud, 8 data bits, none parity, 1 stop bit
Byte / word order
ABCD · bytes big-endian, words high first
Addresses
0-based

Connection values are defaults: the device may be configured differently.

Map

Registers
108 holding registers, 5 coils
Groups
10
Translation tables
3
Revision
1 · 2026-10-31
Firmware
Instruction manual V3.0x K
Added
()
File
maps/novus/n3000.mbmap.json · 22 KB · history
SHA-256
cf504e5ef06d206fcd2fdafb4480d5677540584849be3549c85442bc53572de4
Manufacturer
novus.com.br

Device identity

What a tool can read to check that this map fits the connected device (SPEC.md section 4.7). Registers with a role are read like any other register.

Registers
RoleRegisterAddressTypeValues
Firmware Software version holding 7 uint16
Model Equipment ID holding 8 uint16 2 = N3000

Sources and notes

Source: Novus N3000 controller instruction manual V3.0x K (Portuguese), annex 1

  • Modbus RTU needs the optional RS485 interface; the USB port also speaks Modbus RTU. Functions 03, 05 and 06; writes with address 0 are broadcast.
  • 8 data bits, 1 stop bit, no parity. The manual does not give the factory address or baud rate: check the addr and bavd screens.
  • Every register is a signed 16-bit value. Registers 12 and up can be read and written; most registers below 12 are read-only.
  • Process value, setpoints, limits, offset and alarm setpoints are integers in display units with the decimals of register 30 (dppo): 0 = 3 decimals, 3 = none.
  • A write outside the allowed range is not refused: the controller stores the maximum allowed value and returns it.
  • The ramp and soak programs (registers 73 to 240: events, tolerance, link, times and setpoints of programs 1 to 7) are not listed.
  • Written from the manufacturer's manual; not tested on a device.
AreaAddressNameTypeAccessUnitScaleDescription
HR 0 int16 RW Read: the setpoint in use (main screen, ramp and soak or remote). Write: the main screen setpoint. In display units, with the decimals of register 30 (dppo)
HR 1 int16 R In display units, with the decimals of register 30 (dppo)
HR 2 int16 R % ×0.1 Active output (manual or automatic)
HR 4 int16 RW Value of the screen being shown; range depends on the screen
HR 5 uint16 R High byte: screen cycle, low byte: screen
HR 25 int16 RW SV, the main screen setpoint. In display units, with the decimals of register 30 (dppo)
HR 28 int16 RW % ×0.1
HR 46 uint16 RW avto
HR 47 uint16 RW rvn (run)
HR 48 uint16 RW
HR 49 uint16 RW atvn
HR 54 uint16 W
HR 6 bool bit 0 R
HR 6 bool bit 1 R
HR 6 bool bit 2 R
HR 6 bool bit 3 R
HR 6 bool bit 4 R
HR 6 bool bit 6 R
HR 9 bool bit 0 R
HR 9 bool bit 1 R
HR 9 bool bit 2 R
HR 9 bool bit 4 R
HR 9 bool bit 5 R
HR 9 bool bit 6 R
HR 9 bool bit 7 R
HR 9 bool bit 8 R
HR 9 bool bit 9 R
HR 9 bool bit 11 R
HR 9 bool bit 12 R
HR 9 bool bit 13 R
HR 9 bool bit 14 R
HR 9 bool bit 15 R
HR 10 bool bit 0 R
HR 10 bool bit 1 R
HR 10 bool bit 2 R
HR 10 bool bit 3 R
HR 10 bool bit 4 R
HR 10 bool bit 5 R
HR 10 bool bit 6 R
HR 10 bool bit 7 R
CO 0 bool RW Coil 1 in the manual. Can be written only when I/O1 function is Off
CO 1 bool RW Coil 2 in the manual. Can be written only when I/O2 function is Off
CO 2 bool RW Coil 3 in the manual. Can be written only when I/O3 function is Off
CO 3 bool RW Coil 4 in the manual. Can be written only when I/O4 function is Off
CO 4 bool RW Coil 5 in the manual. Can be written only when I/O5 function is Off
HR 11 uint16 RW rep/min ×0.01
HR 12 uint16 RW s
HR 13 uint16 RW % ×0.1 0 = On/Off control
HR 15 uint16 RW s ×0.1
HR 17 int16 RW In display units, with the decimals of register 30 (dppo)
HR 19 uint16 RW % ×0.1
HR 20 uint16 RW % ×0.1
HR 68 int16 RW %
HR 66 uint16 RW s
HR 270 int16 RW % ieov
HR 271 uint16 RW min
HR 43 uint16 RW type. The manual lists J, K, T, N, R, S, B, E, Pt100, 0-50 mV, 4-20 mA, 0-5 V, 0-10 V and square root, without their codes
HR 30 uint16 RW dppo
HR 67 uint16 RW
HR 29 int16 RW In display units, with the decimals of register 30 (dppo)
HR 264 uint16 RW
HR 26 int16 RW spll. In display units, with the decimals of register 30 (dppo)
HR 27 int16 RW spkl. In display units, with the decimals of register 30 (dppo)
HR 254 int16 R
HR 243 uint16 RW
HR 244 uint16 RW
HR 55 int16 RW In display units, with the decimals of register 30 (dppo)
HR 56 int16 RW In display units, with the decimals of register 30 (dppo)
HR 31 int16 RW In display units, with the decimals of register 30 (dppo)
HR 35 uint16 RW
HR 39 int16 RW The manual gives 0 to 9999 (0.00 to 99.99 %)
HR 50 uint16 RW
HR 32 int16 RW In display units, with the decimals of register 30 (dppo)
HR 36 uint16 RW
HR 40 int16 RW The manual gives 0 to 9999 (0.00 to 99.99 %)
HR 51 uint16 RW
HR 33 int16 RW In display units, with the decimals of register 30 (dppo)
HR 37 uint16 RW
HR 41 int16 RW The manual gives 0 to 9999 (0.00 to 99.99 %)
HR 52 uint16 RW
HR 34 int16 RW In display units, with the decimals of register 30 (dppo)
HR 38 uint16 RW
HR 42 int16 RW The manual gives 0 to 9999 (0.00 to 99.99 %)
HR 53 uint16 RW
HR 62 uint16 RW s
HR 63 uint16 RW s
HR 64 uint16 RW s
HR 65 uint16 RW s
HR 257 uint16 RW s
HR 258 uint16 RW s
HR 259 uint16 RW s
HR 260 uint16 RW s
HR 256 uint16 RW flsh
HR 57 uint16 RW
HR 58 uint16 RW
HR 59 uint16 RW
HR 60 uint16 RW
HR 61 uint16 RW
HR 69 uint16 RW
HR 22 uint16 RW

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