MBMap Registry
  1. Devices
  2. Bronkhorst
  3. Digital Mass Flow / Pressure (MBC)

Bronkhorst Digital Mass Flow / Pressure (MBC) Modbus register map

Also covers MBC3, MBCII, EL-FLOW, IN-FLOW, CORI-FLOW, LIQUI-FLOW L30, MASS-VIEW

Digital multibus mass flow and pressure meters and controllers with the Modbus slave interface

  • Official
  • 65 registers
  • Modbus RTU
  • Revision 1 · 2026-10-18
  • Identity: firmware, serial number

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.

Download .mbmap.json Raw JSON View on GitHub Suggest a correction Report a problem

Communication

Protocol
Modbus RTU
Unit ID
1
Serial
19200 8E1 · 19200 baud, 8 data bits, even parity, 1 stop bit
Byte / word order
ABCD · bytes big-endian, words high first
Addresses
0-based
Max read
50 registers per request

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

Map

Registers
65 holding registers
Groups
8
Revision
1 · 2026-10-18
Added
()
File
maps/bronkhorst/mbc-modbus.mbmap.json · 11 KB · history
SHA-256
b591b0c59ab1a17b6eac41caec1dee53493b1dddf3918110e3b0177b970ddf9b
Manufacturer
bronkhorst.com

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
Serial number Serial number holding 61720 string[8]
Firmware Firmware version holding 61736 string[3]

Sources and notes

Source: Bronkhorst, Modbus slave interface for digital Mass Flow / Pressure instruments, document 9.17.035 (27-03-2013)

  • Addresses are the PDU addresses of the manual (register number minus 1). The manual lists only the most commonly used parameters.
  • RS485 two-wire, RTU (MBC3 and MASS-VIEW can also use ASCII). Delivered with address 1 and 19200 baud; 9600, 19200 and 38400 baud everywhere, 57600 and 115200 on MBC3 only.
  • Parity is even and fixed on MBCII, CORI-FLOW and MASS-VIEW; MBC3 allows even, odd or none (no parity needs 2 stop bits).
  • Byte parameters read as a 16-bit register with the upper byte 0. Floats and long integers use two registers, high word first; strings hold two characters per register, first character in the high byte.
  • Reading a part of a two-register parameter returns exception 02; reading a write-only register returns exception 04.
  • A reply takes up to 100 ms. A read response is limited to 100 bytes at 9600 baud, 200 at 19200 and 400 at 38400.
  • Meaning of the values (units, control modes, alarm modes) is in the Operation instructions for digital instruments, document 9.17.023.
AreaAddressNameTypeAccessUnitScaleDescription
HR 0 uint16 W
HR 10 uint16 RW
HR 31 uint16 RW Range 0 to 32767
HR 32 uint16 R
HR 33 uint16 RW
HR 34 uint16 RW
HR 35 uint16 R
HR 36 uint16 RW
HR 46 uint16 RW
HR 47 uint16 RW
HR 48 uint16 RW
HR 52 uint16 R
HR 1063 uint16 R
HR 3105 uint16 RW
HR 3106 uint16 RW
HR 3107 uint16 RW
HR 3109 uint16 RW
HR 3110 uint16 RW
HR 3111 uint16 RW
HR 3113 uint16 RW
HR 3329 uint16 RW
HR 3330 uint16 RW
HR 3331 uint16 RW
HR 3333 uint16 RW
HR 3334 uint16 RW
HR 3336 uint16 RW
HR 3628 uint16 RW
HR 3653 uint16 RW
HR 3665 uint16 RW
HR 3666 uint16 RW
HR 3681 uint16 RW
HR 3682 uint16 RW
HR 3688 uint16 W
HR 3717 uint16 RW
HR 4010 uint16 RW Slave address, 1 to 247. Rotary switches, when set to a valid address, take over
HR 33064 float32 ABCD RW
HR 33072 float32 ABCD RW
HR 33080 float32 ABCD RW
HR 33088 float32 ABCD RW
HR 33112 float32 ABCD RW
HR 33120 float32 ABCD RW
HR 33128 float32 ABCD RW
HR 33160 string[5] RW
HR 33272 string[4] RW
HR 41216 float32 ABCD R
HR 41240 float32 ABCD RW
HR 41272 float32 ABCD R
HR 41392 float32 ABCD RW
HR 59400 float32 ABCD RW
HR 59416 float32 ABCD RW
HR 59448 string[2] R
HR 61704 string[3] R
HR 61712 string[7] RW
HR 61720 string[8] RW
HR 61728 string[8] RW
HR 61736 string[3] R
HR 61744 string[7] RW
HR 62120 float32 ABCD RW
HR 62128 float32 ABCD RW
HR 62136 float32 ABCD RW
HR 62584 float32 ABCD R
HR 62728 float32 ABCD RW
HR 62736 float32 ABCD RW
HR 62752 float32 ABCD RW
HR 64840 uint32 ABCD RW Baud rate; 57600 and 115200 only on MBC3 instruments

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