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Treetech LAP Modbus register map

Lite transformer temperature monitor: up to six sensors, four relays, a digital output and a current loop output, cooling groups and winding ageing

  • Official
  • 306 registers
  • Modbus RTU
  • Revision 1 · 2026-11-10
  • Identity: 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
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
78 holding registers, 45 input registers, 60 coils, 123 discrete inputs
Groups
18
Translation tables
15
Revision
1 · 2026-11-10
Firmware
1.00 r8
Added
()
File
maps/treetech/lap.mbmap.json · 50 KB · history
SHA-256
e6f7f679dcefcb2cdd666c510fbda147c02044d050d6b0def9c361460ea411a7
Manufacturer
treetech.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
Serial number Serial number input 45000 uint32 ABCD

Sources and notes

Source: Treetech LAP Mapa de Protocolos de Comunicação MAP-085, rev. 1.01

  • Modbus RTU on RS-485, FC01 to FC06, FC15 and FC16. Addresses are 0-based, as sent on the wire.
  • Baud rate is selectable (4800 to 115200 bit/s), 8 data bits, no parity, 1 or 2 stop bits (detected automatically). The document gives no factory default for the baud rate or the address; 9600 and 1 are assumed here.
  • The document lists every value as a 16-bit word without stating a scale. Temperatures are whole degrees; the remaining life time (0 to 6553.5 years) and the pulse times (0.1 to 999.9 s) are read as tenths from their ranges.
  • Left out: the password registers, the first and second alarm and self-diagnostics words (input 0 to 7, the same bits are in the discrete inputs), the 48-bit timestamp, the holding copies of the temperatures (1000 to 1005) and the reset-to-defaults and log reset commands.
  • The document was written for firmware 1.00 r8. Written from that document; this map has not been tested on a device.
AreaAddressNameTypeAccessUnitScaleDescription
HR 0 uint16 RW
HR 100 uint16 RW s ×0.1 Range 0.1 to 999.9 s; the 0.1 scale is read from that range, as the document only lists the range
HR 101 uint16 RW s ×0.1 Range 0 to 999.9 s; the 0.1 scale is read from that range
HR 102 uint16 RW s ×0.1 Range 0.1 to 999.9 s; the 0.1 scale is read from that range, as the document only lists the range
HR 103 uint16 RW s ×0.1 Range 0 to 999.9 s; the 0.1 scale is read from that range
HR 104 uint16 RW s ×0.1 Range 0.1 to 999.9 s; the 0.1 scale is read from that range, as the document only lists the range
HR 105 uint16 RW s ×0.1 Range 0 to 999.9 s; the 0.1 scale is read from that range
HR 106 uint16 RW s ×0.1 Range 0.1 to 999.9 s; the 0.1 scale is read from that range, as the document only lists the range
HR 107 uint16 RW s ×0.1 Range 0 to 999.9 s; the 0.1 scale is read from that range
HR 108 uint16 RW s ×0.1 Range 0.1 to 999.9 s; the 0.1 scale is read from that range, as the document only lists the range
HR 109 uint16 RW s ×0.1 Range 0 to 999.9 s; the 0.1 scale is read from that range
HR 200 uint16 RW
HR 201 uint16 RW
HR 202 int16 RW °C
HR 203 int16 RW °C
HR 204 uint16 RW
HR 205 uint16 RW mA
HR 400 uint16 RW
HR 401 uint16 RW
HR 402 uint16 RW
HR 403 uint16 RW
HR 404 uint16 RW ms Wait before sending a reply
HR 405 uint16 RW ms Wait after receiving a request
HR 500 uint16 RW min Minimum time between records in the mass memory log
HR 501 uint16 RW °C Temperature change that triggers a new record
HR 10000 uint16 RW Number of temperature sensors in use
HR 10001 int16 RW °C
HR 10002 int16 RW °C
HR 10003 int16 RW °C
HR 10004 int16 RW °C
HR 10005 int16 RW °C
HR 10006 int16 RW °C
HR 10007 int16 RW °C
HR 10008 int16 RW °C
HR 10009 int16 RW °C
HR 10010 int16 RW °C
HR 10011 int16 RW °C
HR 10012 int16 RW °C
HR 10013 uint16 RW min
HR 11000 int16 RW °C
HR 11001 int16 RW °C
HR 11002 int16 RW °C
HR 11003 int16 RW °C
HR 11004 int16 RW °C
HR 11005 int16 RW °C
HR 11006 int16 RW °C
HR 11007 int16 RW °C
HR 11008 int16 RW °C
HR 11009 int16 RW °C
HR 11010 int16 RW °C
HR 11011 int16 RW °C
HR 11012 uint16 RW °C
HR 11013 uint16 RW min
HR 11014 uint16 RW h
HR 11015 uint16 RW min
HR 11016 uint16 RW
HR 11017 uint16 RW
HR 12000 uint16 RW
HR 12001 uint16 RW
HR 12002 uint16 RW
HR 12003 uint16 RW
HR 12004 uint16 RW %
HR 12005 uint16 RW %
HR 12006 uint16 RW %
HR 12007 uint16 RW %
HR 12008 uint16 RW %
HR 12009 uint16 RW %
HR 12010 uint16 RW %
HR 12011 uint16 RW years
HR 12012 uint16 RW h
HR 45100 int16 RW
HR 45101 uint16 RW
HR 45102 uint16 RW
HR 45103 uint16 RW
HR 45104 uint16 RW
HR 45105 uint16 RW
HR 45106 uint16 RW
HR 45107 uint16 RW
IR 10000 int16 R °C
IR 10001 int16 R °C
IR 10002 uint16 R min Time left before the shutdown on high temperature
IR 10003 int16 R °C
IR 10004 int16 R °C
IR 10005 uint16 R min Time left before the shutdown on high temperature
IR 10006 int16 R °C
IR 10007 int16 R °C
IR 10008 uint16 R min Time left before the shutdown on high temperature
IR 10009 int16 R °C
IR 10010 int16 R °C
IR 10011 uint16 R min Time left before the shutdown on high temperature
IR 10012 int16 R °C
IR 10013 int16 R °C
IR 10014 uint16 R min Time left before the shutdown on high temperature
IR 10015 int16 R °C
IR 10016 int16 R °C
IR 10017 uint16 R min Time left before the shutdown on high temperature
IR 12000 uint16 R years ×0.1 Range 0 to 6553.5 years
IR 12001 uint16 R %
IR 12002 uint16 R years ×0.1 Range 0 to 6553.5 years
IR 12003 uint16 R %

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