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BACnet instance calculator · Procon BAC-IP/50
Mitsubishi Electric Procon BAC-IP/50 BACnet Instance Calculator
Free browser tool · nothing is uploaded · 5 November 2026
The Procon BAC-IP/50 gives every unit on its G-50 a block of objects numbered 1, the 3-digit unit address and the point number.
Procon BAC-IP/50 unit objects are 1 UUU PP: a leading 1, the unit address (001-050) and the point number. Unit 017's setpoint command (point 09) is AO 101709. Outdoor (OC/BC) error codes use the same pattern with addresses 051-100 and point 22.
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 = 100000 + unit address x 100 + point
| Part | Meaning | Range |
|---|---|---|
| 1 | Fixed first digit | 1 |
| UUU | Unit address (OC/BC addresses 051-100 for point 22) | 001-100 |
| PP | Point number | 01-27 |
Unit addresses are the M-NET addresses of the units on the G-50. Only the master unit of each group accepts commands. System objects (100023-100027) are fixed.
Worked example: unit address 017
The first objects for unit address 017 on the BAC-IP/50, worked out with the formula above:
| Object | Name (as printed) | What it is |
|---|---|---|
| BO 101701 | nnn_ON_w | On/Off setup |
| BI 101702 | nnn_ON_r | On/Off state |
| AI 101703 | nnn_ECode | Unit error code, 4 digits (8000 = no error) |
| MO 101704 | nnn_MD_w | Operation mode setup |
| MI 101705 | nnn_MD_r | Operation mode state |
| MO 101706 | nnn_FS_w | Fan speed setup |
| AI 105122 | nnn_ECode | OC/BC (outdoor) error code, 8000 = no error |
Source
Formula and objects from Procon BAC-IP/50 Installation and User Guide · rev. 2009-07-20 (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?
Procon BAC-IP/50 unit objects are 1 UUU PP: a leading 1, the unit address (001-050) and the point number. Unit 017's setpoint command (point 09) is AO 101709. Outdoor (OC/BC) error codes use the same pattern with addresses 051-100 and point 22.
Why do my commands to a unit do nothing?
Only the group's master unit accepts commands on the BAC-IP/50; writes to slave unit addresses have no effect.
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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