ABB · PUBLIC DEVICE MAP
B21 Modbus register map
Core read-only instrumentation block from the official B21 Modbus mapping. Register addresses are the hexadecimal protocol offsets stated by ABB.
2 groups, 7 decoded points.
REGISTER MAP
Searchable source data.
Documentation addresses are derived from the zero-based PDU address in the public definition. Convert a documentation address to its PDU offset when comparing with the manual. Confirm the map against revision 2CMC485004M0201 Rev C and the installed device before commissioning.
Voltage and current
3 of 3| Signal / register | Doc address | PDU | Type | Unit | Notes |
|---|---|---|---|---|---|
| Phase voltage L1-N | 44099 | 4098–4099 | uint32 | V | Read-only ABB DMTME-compatible instrumentation value. |
| Line current L1 | 44113 | 4112–4113 | uint32 | A | Read-only ABB DMTME-compatible instrumentation value. |
| Frequency | 44167 | 4166–4167 | uint32 | Hz | Read-only ABB DMTME-compatible instrumentation value. |
Power
4 of 4| Signal / register | Doc address | PDU | Type | Unit | Notes |
|---|---|---|---|---|---|
| Power factor L1 | 44121 | 4120–4121 | int32 | — | Read-only ABB DMTME-compatible instrumentation value. |
| Apparent power L1 | 44137 | 4136–4137 | uint32 | VA | Read-only ABB DMTME-compatible instrumentation value. |
| Active power L1 | 44145 | 4144–4145 | uint32 | W | Read-only ABB DMTME-compatible instrumentation value. |
| Reactive power L1 | 44153 | 4152–4153 | uint32 | VAr | Read-only ABB DMTME-compatible instrumentation value. |
SOURCE & SCOPE
Import the map, then verify the device.
The catalogue provides register metadata, not a connection profile. Serial port, Unit ID, baud rate and site-specific naming stay in your Busloom project.