MBMap Registry
  1. Devices
  2. Schneider Electric
  3. Sepam 40

Schneider Electric Sepam 40 Modbus register map

Also covers Sepam series 40

Digital protection relay (Modbus RTU)

  • Official
  • 167 registers
  • Revision 3 · 2026-10-18

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 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
167 holding registers
Groups
10
Revision
3 · 2026-10-18
Added
()
File
maps/schneider-electric/sepam-40.mbmap.json · 37 KB · history
SHA-256
7b8c24469f0964918fbd6a0b75b4ed0ea105f53a2d01c4b7c7f0ed11d2b186b4
Manufacturer
se.com

Sources and notes

Source: Schneider Electric, Sepam series 40 user's manual, PCRED301006EN, chapter Modbus communication

  • Addresses are the word addresses of the manual (hexadecimal), as sent on the wire. Values are read with FC03 or FC04.
  • 32-bit values have the most significant word first. 16-bit signed values are two's complement. The measurement zones come twice, with a scale of x 1 and x 10 (and x 100 for the powers), so a value can be read with the resolution that fits.
  • Text values (ASCII) have character n in the low byte and character n+1 in the high byte of each word.
  • A measurement that overruns the maximum value of its format reads as that maximum.
  • Not in this map: the event tables, the settings and disturbance recording zones (indirect access), the individual status and remote control bits, and the test zone.
  • The energy registers appear in both measurement zones; they have the same content.
AreaAddressNameTypeAccessUnitScaleDescription
HR 2 uint16 RW
HR 3 uint16 R
HR 4 uint16 R
HR 5 uint16 R
HR 6 uint16 R 0x0100 for Schneider Electric Sepam
HR 7 uint16 R
HR 8 uint16 R Same as register 0x02E2; the high byte is 0x11 for Sepam series 40, the low byte is the hardware configuration
HR 256 uint16 R Bit 15 event in zone 1, bit 14 data loss in zone 1, bit 13 not synchronous, bit 12 time not correct, bit 11 event in zone 2, bit 10 data loss in zone 2, bit 9 major fault, bit 8 partial fault, bit 7 setting group A, bit 6 setting group B, bit 1 local setting mode
HR 257 uint16 R One bit per remote indication
HR 258 uint16 R One bit per remote indication
HR 259 uint16 R One bit per remote indication
HR 261 uint16 R One bit per remote indication
HR 262 uint16 R One bit per remote indication
HR 263 uint16 R One bit per remote indication
HR 264 uint16 R One bit per remote indication
HR 265 uint16 R One bit per remote indication
HR 267 uint16 R Bits 0 to 3: I11 to I14; bits 4 to 9: I21 to I26
HR 268 uint16 R Bits 0 to 7: V1 to V8; bits 8 to 9: V9, V10; bits 10 to 13: V_TRIPCB, V_CLOSECB, V_INHIBCLOSE, V_FLAGREC
HR 269 uint16 R Bits 0 to 3: O1 to O4; bits 4 to 7: O11 to O14
HR 270 uint16 R Bit 0: LD (red LED, Sepam unavailable); bits 1 to 9: L1 to L9
HR 271 int16 RW
HR 275 uint16 R A ×0.1
HR 276 uint16 R A ×0.1
HR 277 uint16 R A ×0.1
HR 278 uint16 R A ×0.1
HR 279 uint16 R A ×0.1
HR 280 uint16 R A ×0.1
HR 281 uint16 R A ×0.1
HR 282 uint16 R A ×0.1
HR 283 uint16 R A ×0.1
HR 284 uint16 R A ×0.1
HR 285 uint16 R A ×0.1
HR 286 uint16 R V
HR 287 uint16 R V
HR 288 uint16 R V
HR 289 uint16 R V
HR 290 uint16 R V
HR 291 uint16 R V
HR 292 uint16 R V
HR 293 uint16 R V
HR 294 uint16 R V
HR 295 uint16 R Hz ×0.01
HR 296 int16 R kW
HR 297 int16 R kvar
HR 298 int16 R kVA
HR 299 int16 R kW
HR 300 int16 R kvar
HR 301 int16 R ×0.01
HR 302 uint32 ABCD R kWh ×100
HR 304 uint32 ABCD R kWh ×100
HR 306 uint32 ABCD R kvarh ×100
HR 308 uint32 ABCD R kvarh ×100
HR 310 uint16 R A
HR 311 uint16 R A
HR 312 uint16 R A
HR 313 uint16 R A
HR 314 uint16 R A
HR 315 uint16 R A
HR 316 uint16 R A
HR 317 uint16 R A
HR 318 uint16 R A
HR 319 uint16 R A
HR 320 uint16 R A
HR 321 uint16 R V ×10
HR 322 uint16 R V ×10
HR 323 uint16 R V ×10
HR 324 uint16 R V ×10
HR 325 uint16 R V ×10
HR 326 uint16 R V ×10
HR 327 uint16 R V ×10
HR 328 uint16 R V ×10
HR 329 uint16 R V ×10
HR 330 uint16 R Hz ×0.01
HR 331 int16 R kW ×100
HR 332 int16 R kvar ×100
HR 333 int16 R kVA ×100
HR 334 int16 R kW ×100
HR 335 int16 R kvar ×100
HR 336 int16 R ×0.01
HR 337 uint32 ABCD R kWh ×100
HR 339 uint32 ABCD R kWh ×100
HR 341 uint32 ABCD R kvarh ×100
HR 343 uint32 ABCD R kvarh ×100
HR 345 uint16 R %
HR 346 uint16 R A ×10
HR 347 uint16 R A ×10
HR 348 uint16 R A ×10
HR 350 uint16 R kA²
HR 351 uint16 R
HR 352 uint16 R ms
HR 353 uint16 R ms
HR 354 uint16 R h
HR 356 uint16 R %
HR 357 uint16 R min
HR 358 uint16 R min
HR 359 uint16 R % lb
HR 360 uint16 R s ×0.1
HR 361 uint16 R A
HR 362 uint16 R min
HR 363 uint16 R

Help improve this map

Esc