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BACnet instance calculator · BAC-HD150 BM Adapter
Mitsubishi Electric BAC-HD150 BACnet Instance Calculator
Free browser tool · nothing is uploaded · 5 November 2026
The BAC-HD150 BM Adapter numbers every CITY MULTI group's objects as M-NET number, group number and point number. Enter the M-NET number and group to get that group's instances.
BAC-HD150 instances are six digits MM GG PP: M-NET number (01-03), group number (01-50) and point number. Leading zeros drop off the real number, so M-NET 1, group 12, Set Temp (point 10) is AV 11210, and M-NET 2, group 3, On Off Setup is BO 20301.
Mitsubishi Electric calculator
The calculator needs JavaScript. The formula and a worked example are below.
Which unit does this instance belong to?
How the numbers are built
instance = M-NET number x 10000 + group x 100 + point
| Part | Meaning | Range |
|---|---|---|
| MM | M-NET number | 01-03 |
| GG | Group number | 01-50 (99 = collective) |
| PP | Point number (same for every group) | 01-38 |
M-NET and group numbers are the ones set in the BAC-HD150 Setting Tool. System Forced Off for all groups is fixed at 999921.
Worked example: M-NET 01, group 12
The first objects for M-NET 01, group 12 on the BAC-HD150, worked out with the formula above:
| Object | Name (as printed) | What it is |
|---|---|---|
| BO 11201 | On Off Setup | Start/stop command for the group |
| BI 11202 | On Off State | Group run status |
| BI 11203 | Alarm Signal | Group alarm |
| MI 11204 | Error Code | Error category for the group |
| MO 11205 | Operational Mode Setup | Operating mode command |
| MI 11206 | Operational Mode State | Current operating mode |
| BI 19981 | Expansion Controller Communication State | Expansion controller comms status |
Source
Formula and objects from Air-conditioner Control System BM ADAPTER BAC-HD150 Instruction Book · WT05542X04 (manufacturer document ↗), re-typed in our points list. Object names are shown as printed.
Check it against the live device. The calculator applies the formula from the manufacturer’s documentation; the gateway in front of you may expose fewer objects or use other numbers after a firmware change. Easy BACnet scans a network for BACnet IP devices from an Android phone and reads every object on them — a quick way to confirm one unit before you map a whole building.
Questions
How do I work out a Mitsubishi Electric instance number?
BAC-HD150 instances are six digits MM GG PP: M-NET number (01-03), group number (01-50) and point number. Leading zeros drop off the real number, so M-NET 1, group 12, Set Temp (point 10) is AV 11210, and M-NET 2, group 3, On Off Setup is BO 20301.
Why is the instance five digits, not six?
MMGGPP starts with a zero for M-NET 01 (010101), and BACnet stores numbers, so it shows as 10101. M-NET 02 and 03 give 2xxxx and 3xxxx.
Which setpoint object should I use?
Single-setpoint groups use Set Temp (point 10). Dual-setpoint groups use Set Temp Cool/Heat (24/25), which only work with Old Model Compatibility Mode turned off.
Is this Mitsubishi Electric calculator official?
No. It applies the formula printed in Mitsubishi Electric's own documentation to the points list in our library. Confirm the numbers against a scan of the live device before you map or write anything.
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