MBMap Registry
  1. Devices
  2. Forlong
  3. DRT 301M

Forlong DRT 301M Modbus register map

  • Unofficial
  • 50 registers
  • Revision 2

Unofficial: Copied from an unofficial source and not tested. Read it as a draft and check a value on the real device before you rely on the rest. 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 TCP and RTUdefault
Unit ID
1default
TCP port
502default
Serial
9600 8E1 · 9600 baud, 8 data bits, even parity, 1 stop bit defaults
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
50 holding registers
Revision
2
Added
()
File
maps/forlong/drt-301m.mbmap.json · 7 KB · history
SHA-256
f5ab6d438cd33ebb928f20dcb399d52ce98c3de38f773229cd8a996fe40911f7
Manufacturer
www.china-meters.com

Sources and notes

Source: Modbus Database (Jibril Sharafi, MIT licence), table forlong/drt-301m; https://www.aggsoft.com/serial-data-logger/tutorials/modbus-data-logging/forlong-drt-301m.htm. Not verified against the manufacturer's documentation

  • Forlong DRT 301M.
  • Converted automatically from the Modbus Database (MIT licence, Jibril Sharafi).
  • Not verified against the manufacturer's documentation. The byte order is a guess: the source does not give one.
  • Corrections are welcome (CONTRIBUTING.md). Change x_status once this table has been checked against the manual.
AreaAddressNameTypeAccessUnitScaleDescription
HR 16 uint32 ABCD R V
HR 18 uint32 ABCD R V
HR 20 uint32 ABCD R V
HR 78 uint32 ABCD R Hz
HR 80 uint32 ABCD R A
HR 82 uint32 ABCD R A
HR 84 uint32 ABCD R A
HR 86 uint32 ABCD R A
HR 144 uint32 ABCD R kW
HR 146 uint32 ABCD R kW
HR 148 uint32 ABCD R kW
HR 150 uint32 ABCD R kW
HR 208 uint32 ABCD R kVA
HR 210 uint32 ABCD R kVA
HR 212 uint32 ABCD R kVA
HR 214 uint32 ABCD R kVA
HR 272 uint32 ABCD R kvar
HR 274 uint32 ABCD R kvar
HR 276 uint32 ABCD R kvar
HR 278 uint32 ABCD R kvar
HR 336 uint32 ABCD R
HR 338 uint32 ABCD R
HR 340 uint32 ABCD R
HR 342 uint32 ABCD R
HR 352 uint32 ABCD R kW
HR 358 uint32 ABCD R kW
HR 2000 uint32 ABCD R kW
HR 2002 uint32 ABCD R kW
HR 2004 uint32 ABCD R kW
HR 2006 uint32 ABCD R kW
HR 2256 uint32 ABCD R kW
HR 2258 uint32 ABCD R kW
HR 2260 uint32 ABCD R kW
HR 2262 uint32 ABCD R kW
HR 61440 string[8] R
HR 61713 uint32 ABCD R kW
HR 61715 uint32 ABCD R kW
HR 61717 uint32 ABCD R kW
HR 61719 uint32 ABCD R kW
HR 61721 uint32 ABCD R kW
HR 61729 uint32 ABCD R kW
HR 61731 uint32 ABCD R kW
HR 61733 uint32 ABCD R kW
HR 61735 uint32 ABCD R kW
HR 61737 uint32 ABCD R kW
HR 61745 uint32 ABCD R kW
HR 61747 uint32 ABCD R kW
HR 61749 uint32 ABCD R kW
HR 61751 uint32 ABCD R kW
HR 61753 uint32 ABCD R kW

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