I have found that using the Set feature in Niagara does not always write to BACnet priority 10.
By doing this you can still use Set in Niagara/ Tridium graphics
A simple workaround I use is to create a link within the Bacnet Setpoint block so the Out value feeds back into In10.
![BacnetSetpoint graphic on a grid background, showing "Numeric Writable" with outputs "Out 23.0°C [ok] @ def" and inputs "In10" and "In16".](https://static.wixstatic.com/media/3eaf15_1ca13e885f714dda9657b92594cea1ee~mv2.png/v1/fill/w_58,h_29,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/3eaf15_1ca13e885f714dda9657b92594cea1ee~mv2.png)
How to do it
Add a Bacnet block.
I recently attended a service call regarding a BMS issue where three toilet exhaust fans were not operating.
Upon arrival, I began with the BMS side and confirmed that the controller outputs were enabled and showing “On” at the BMS panel. I then proceeded to the roof, where the site electrician had verified that power was present at the fan isolators. However, I found no voltage at the fan terminals themselves.
This led me to suspect that the fans may be controlled via enable contactors located elsewhere in the building. After further investigation, we located the contactors within a ceiling space. All three overloads had tripped, which explained the issue.
This was a good reminder that applying some logical steps and digging a bit deeper can often lead to the root cause.
Suggested BMS Fault Investigation Procedure:
1. Check BMS Output Status: Confirm that the BMS point is enabled or…
