Grundfos · Pump controller
Dedicated Controls CU 361 / CU 362 with CIM 200 Modbus register map
Default configuration
- Protocol
- RS485
- Port
- 502
- Unit ID
- 1
- Addressing
- 1-based
- Byte order
- Big endian
- Word order
- High word first
- Baud rate
- 19200
- Parity
- Even
- Data bits
- 8
- Stop bits
- 1
This device has an RS-485 interface. Reach it through a Modbus RTU-to-TCP gateway, configured with the factory serial settings above.
Register map
| Address | Count | Name | Type | Unit | Scale | Access |
|---|---|---|---|---|---|---|
| 301 | 1 | Pit water level Sensor-measured water level in the pit. Requires a level sensor. | UInt16 | m | 0.01 | R |
| 302 | 1 | Float-switch water level Float-switch-detected water level in the pit, valid range 0-5 (0-5). Requires one or more float switches. | UInt16 | - | 1 | R |
| 303 | 1 | Pit depth Depth of the pit. | UInt16 | m | 0.01 | R |
| 304 | 1 | Pit inflow Actual flow into the pit. Requires a flow sensor or a flow calculation from the level sensor. | UInt16 | litre/s | 0.1 | R |
| 305 | 1 | Pit average inflow Average flow into the pit. Requires a flow sensor or a flow calculation from the level sensor. | UInt16 | litre/s | 0.1 | R |
| 306 | 1 | Pit outflow Actual flow out of the pit. Requires a flow sensor or a flow calculation from the level sensor. | UInt16 | litre/s | 0.1 | R |
| 307 | 1 | Pit average outflow Average flow out of the pit. Requires a flow sensor or a flow calculation from the level sensor. | UInt16 | litre/s | 0.1 | R |
| 308 | 2 | Pit power consumption Power consumption of the pit, HI word at 00308 and LO word at 00309. Requires a power sensor or an MP 204. | UInt32 | W | 1 | R |
| 310 | 2 | Pit energy consumption Energy consumption of the pit, HI word at 00310 and LO word at 00311. Requires a power sensor or an MP 204. | UInt32 | kWh | 0.1 | R |
| 312 | 1 | Pit energy, yesterday Energy consumption of the pit yesterday. Requires a power sensor or an MP 204. | UInt16 | kWh | 0.1 | R |
| 313 | 1 | Pit energy, today Energy consumption of the pit today. Requires a power sensor or an MP 204. | UInt16 | kWh | 0.1 | R |
| 314 | 1 | Pit specific energy Specific energy consumption of the pit. Requires a power sensor or an MP 204 and a flow sensor. | UInt16 | Wh/m3 | 1 | R |
| 315 | 2 | Pit pumped volume, total Total pumped volume, HI word at 00315 and LO word at 00316. Requires a flow sensor or a flow calculation from the level sensor. | UInt32 | m3 | 0.1 | R |
| 317 | 1 | Pit pumped volume, yesterday Total pumped volume yesterday. Requires a flow sensor or a flow calculation from the level sensor. | UInt16 | m3 | 0.1 | R |
| 318 | 1 | Pit pumped volume, today Total pumped volume today. Requires a flow sensor or a flow calculation from the level sensor. | UInt16 | m3 | 0.1 | R |
| 319 | 1 | Mixer starts per hour Number of mixer starts per hour. Requires a mixer. | UInt16 | - | 1 | R |
| 320 | 1 | Pit overflow volume, total Pit overflow volume. Requires a level sensor. | UInt16 | m3 | 0.1 | R |
| 321 | 1 | Pit overflow volume, yesterday Pit overflow volume yesterday. Requires a level sensor. | UInt16 | m3 | 0.1 | R |
| 322 | 1 | Pit overflow volume, today Pit overflow volume today. Requires a level sensor. | UInt16 | m3 | 0.1 | R |
| 323 | 1 | Pit overflow time, total Pit overflow time. Requires a level sensor or float switches. | UInt16 | min | 1 | R |
| 324 | 1 | Pit overflow time, yesterday Pit overflow time yesterday. Requires a level sensor or float switches. | UInt16 | min | 1 | R |
| 325 | 1 | Pit overflow time, today Pit overflow time today. Requires a level sensor or float switches. | UInt16 | min | 1 | R |
| 326 | 1 | Pit overflow counter, total Number of pit overflows. Requires a level sensor or float switches. | UInt16 | - | 1 | R |
| 327 | 1 | Pit overflow counter, yesterday Number of pit overflows yesterday. Requires a level sensor or float switches. | UInt16 | - | 1 | R |
| 328 | 1 | Pit overflow counter, today Number of pit overflows today. Requires a level sensor or float switches. | UInt16 | - | 1 | R |
| 329 | 2 | Pit operating time Total pit operating time (power-on time), HI word at 00329 and LO word at 00330. | UInt32 | min | 1 | R |
| 331 | 2 | Operating time, 2 pumps running, total Total operating time with 2 pumps operating simultaneously, HI word at 0331 and LO word at 0332. | UInt32 | min | 1 | R |
| 333 | 1 | Operating time, 2 pumps running, yesterday Operating time yesterday with 2 pumps operating simultaneously. | UInt16 | min | 1 | R |
| 334 | 1 | Operating time, 2 pumps running, today Operating time today with 2 pumps operating simultaneously. | UInt16 | min | 1 | R |
| 335 | 2 | Operating time, 3 pumps running, total Total operating time with 3 pumps operating simultaneously, HI word at 0335 and LO word at 0336. | UInt32 | min | 1 | R |
| 337 | 1 | Operating time, 3 pumps running, yesterday Operating time yesterday with 3 pumps operating simultaneously. | UInt16 | min | 1 | R |
| 338 | 1 | Operating time, 3 pumps running, today Operating time today with 3 pumps operating simultaneously. | UInt16 | min | 1 | R |
| 339 | 2 | Operating time, 4 pumps running, total Total operating time with 4 pumps operating simultaneously, HI word at 0339 and LO word at 0340. | UInt32 | min | 1 | R |
| 341 | 1 | Operating time, 4 pumps running, yesterday Operating time yesterday with 4 pumps operating simultaneously. | UInt16 | min | 1 | R |
| 342 | 1 | Operating time, 4 pumps running, today Operating time today with 4 pumps operating simultaneously. | UInt16 | min | 1 | R |
| 343 | 2 | Operating time, 5 pumps running, total Total operating time with 5 pumps operating simultaneously, HI word at 0343 and LO word at 0344. | UInt32 | min | 1 | R |
| 345 | 1 | Operating time, 5 pumps running, yesterday Operating time yesterday with 5 pumps operating simultaneously. | UInt16 | min | 1 | R |
| 346 | 1 | Operating time, 5 pumps running, today Operating time today with 5 pumps operating simultaneously. | UInt16 | min | 1 | R |
| 347 | 2 | Operating time, 6 pumps running, total Total operating time with 6 pumps operating simultaneously, HI word at 0347 and LO word at 0348. | UInt32 | min | 1 | R |
| 349 | 1 | Operating time, 6 pumps running, yesterday Operating time yesterday with 6 pumps operating simultaneously. | UInt16 | min | 1 | R |
| 350 | 1 | Operating time, 6 pumps running, today Operating time today with 6 pumps operating simultaneously. | UInt16 | min | 1 | R |
| 351 | 1 | User analog input 1 User-defined measurement, analog input 1. | UInt16 | % | 0.1 | R |
| 352 | 1 | User analog input 2 User-defined measurement, analog input 2. | UInt16 | % | 0.1 | R |
| 353 | 1 | User analog input 3 User-defined measurement, analog input 3. | UInt16 | % | 0.1 | R |
| 354 | 2 | Operating time, no pumps running, total Total operating time with no pump operating, HI word at 00354 and LO word at 00355. | UInt32 | min | 1 | R |
| 356 | 1 | Operating time, no pumps running, yesterday Operating time yesterday with no pump operating. | UInt16 | min | 1 | R |
| 357 | 1 | Operating time, no pumps running, today Operating time today with no pump operating. | UInt16 | min | 1 | R |
| 358 | 2 | Operating time, one pump running, total Total operating time with one pump operating, HI word at 00358 and LO word at 00359. | UInt32 | min | 1 | R |
| 360 | 1 | Operating time, one pump running, yesterday Operating time yesterday with one pump operating. | UInt16 | min | 1 | R |
| 361 | 1 | Operating time, one pump running, today Operating time today with one pump operating. | UInt16 | min | 1 | R |
| 362 | 1 | Mixer runtime Runtime for the mixer. | UInt16 | min | 1 | R |
| 363 | 1 | Mixer start counter Start counter for the mixer. | UInt16 | - | 1 | R |
| 364 | 1 | User-defined counter 1 User-defined counter 1. | UInt16 | - | 1 | R |
| 365 | 1 | User-defined counter 2 User-defined counter 2. | UInt16 | - | 1 | R |
| 366 | 1 | User-defined counter 3 User-defined counter 3. | UInt16 | - | 1 | R |
| 367 | 1 | Pit outlet pressure Outlet pressure of the pit. | UInt16 | bar | 0.001 | R |
| 378 | 1 | H2S level, actual Actual hydrogen sulphide (H2S) level. | UInt16 | ppm | 1 | R |
| 379 | 1 | H2S level, today Average hydrogen sulphide level today. | UInt16 | ppm | 1 | R |
| 380 | 1 | H2S level, yesterday Average hydrogen sulphide level yesterday. | UInt16 | ppm | 1 | R |
| 381 | 1 | Dosing feed tank level Level in the dosing feed tank. | UInt16 | m | 0.01 | R |
| 404 | 2 | Pump 1 operating time, total Total operating time, HI word at 00404 and LO word at 00405. | UInt32 | min | 1 | R |
| 406 | 2 | Pump 1 time to service Time to next service, HI word at 00406 and LO word at 00407. | UInt32 | min | 1 | R |
| 408 | 1 | Pump 1 operating time, yesterday Operating time yesterday. | UInt16 | min | 1 | R |
| 409 | 1 | Pump 1 operating time, today Operating time today. | UInt16 | min | 1 | R |
| 410 | 1 | Pump 1 latest operating time Operating time the last time the pump ran. | UInt16 | s | 1 | R |
| 411 | 2 | Pump 1 start counter, total Total number of pump starts, HI word at 00411 and LO word at 00412. | UInt32 | - | 1 | R |
| 413 | 1 | Pump 1 start counter, yesterday Number of pump starts yesterday. | UInt16 | - | 1 | R |
| 414 | 1 | Pump 1 start counter, today Number of pump starts today. | UInt16 | - | 1 | R |
| 415 | 1 | Pump 1 starts per hour Number of pump starts within the last hour. | UInt16 | - | 1 | R |
| 416 | 1 | Pump 1 flow Calculated average or measured pump flow. | UInt16 | litre/s | 0.1 | R |
| 417 | 1 | Pump 1 latest flow Latest calculated or measured flow (capacity). | UInt16 | litre/s | 0.1 | R |
| 418 | 1 | Pump 1 motor current Motor current. | UInt16 | A | 0.1 | R |
| 419 | 1 | Pump 1 latest motor current Latest motor current. | UInt16 | A | 0.1 | R |
| 420 | 1 | Pump 1 motor voltage Motor voltage. | UInt16 | V | 0.1 | R |
| 421 | 1 | Pump 1 motor insulation resistance Motor insulation resistance. | UInt16 | kΩ | 10 | R |
| 422 | 1 | Pump 1 water-in-oil Motor water-in-oil measurement. | UInt16 | % | 0.1 | R |
| 423 | 1 | Pump 1 alarms 1 Alarm bit field of the pump; the bit assignments are listed in section 9.8 of the Grundfos functional profile. | Binary | - | 1 | R |
| 424 | 1 | Pump 1 alarms 2 Alarm bit field of the pump; the bit assignments are listed in section 9.8 of the Grundfos functional profile. | Binary | - | 1 | R |
| 425 | 1 | Pump 1 alarms 3 Alarm bit field of the pump; the bit assignments are listed in section 9.8 of the Grundfos functional profile. | Binary | - | 1 | R |
| 426 | 1 | Pump 1 warnings 1 Warning bit field of the pump; the bit assignments are listed in section 9.8 of the Grundfos functional profile. | Binary | - | 1 | R |
| 427 | 1 | Pump 1 warnings 2 Warning bit field of the pump; the bit assignments are listed in section 9.8 of the Grundfos functional profile. | Binary | - | 1 | R |
| 428 | 1 | Pump 1 warnings 3 Warning bit field of the pump; the bit assignments are listed in section 9.8 of the Grundfos functional profile. | Binary | - | 1 | R |
| 429 | 1 | Pump 1 motor temperature 1 Motor temperature 1. Unsigned per the block preamble: counters and scaled values are unsigned unless stated, and 0xFFFF means the value is not available. | UInt16 | °C | 1 | R |
| 430 | 1 | Pump 1 motor temperature 2 Motor temperature 2. Unsigned per the block preamble: counters and scaled values are unsigned unless stated, and 0xFFFF means the value is not available. | UInt16 | °C | 1 | R |
| 431 | 2 | Pump 1 power consumption Power consumption, HI word at 00431 and LO word at 00432. | UInt32 | W | 1 | R |
| 433 | 2 | Pump 1 energy consumption Energy consumption, HI word at 00433 and LO word at 00434. | UInt32 | kWh | 0.1 | R |
| 435 | 1 | Pump 1 cos phi Motor cos phi. | UInt16 | - | 0.01 | R |
| 436 | 1 | Pump 1 motor frequency Motor-applied frequency. | UInt16 | Hz | 0.1 | R |
| 438 | 1 | Pump 1 motor torque Motor torque. | UInt16 | Nm | 0.1 | R |
| 439 | 1 | Pump 1 line current asymmetry Line current asymmetry (iAsym). | UInt16 | % | 0.1 | R |
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Notes
Source: Grundfos 'Modbus for Dedicated Controls' functional profile and user manual 98393520 (03/2023), sections 9.7 Pit data register block and 9.8 Pump 1 register block (grundfos-eica.com/fileadmin/public/Redaktion/Dokumente/PDF/Functional_profiles/98393520_0323_Modbus_for_Dedicated_Controls_IO_GB.pdf). Dedicated Controls (CU 361 / CU 362) is the Grundfos wastewater pit controller; it speaks Modbus through a CIM 200 (RTU, RS-485), CIM 260 (cellular) or CIM 500 (Modbus TCP) module. Addressing follows the vendor's own worked example in section 15: 'registers numbered X are addressed in telegrams as X - 1, for example register 00104 is addressed as 00103', and the read example for block 00301 sends start address 0x012C - so the numbers here are the supplier's 1-based register numbers (one_based). Factory serial settings from 4.2/5.1/5.2: 19200 bit/s (CIM 200 default; 9600 and 38400 are the other DIP-selectable speeds), even parity, 1 stop bit, 8 data bits. The slave address is set with the hex rotary switches SW6/SW7 (1-247; the software-defined default is 231 / 0xE7 when SW4/SW5 enable software configuration). No document gives a factory unit ID: the unit 1 recorded here is a placeholder, not a cited value, and the user must set the address the switches give the CIM 200 on site. The same data are readable as holding registers or input registers, with function 03 and/or 04; the read-only blocks are listed as input registers. 32-bit values are printed as a HI/LO register pair and are listed as one UInt32 row at the HI address. Deliberately left out: the pit control block (00101+), the CIM configuration block (00001+), alarm simulation and the event/data-log blocks - the pit control table prints its address column apart from its bit-by-bit parameter rows, so its rows cannot be paired reliably; also the CIM 260-only rows (signal level, IP address parts, UNIX time). Pump blocks 2-6 (00451-00697) repeat the pump 1 layout and are not duplicated here.