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Techdr13, joyceybazookas, Cphreak & numbawunfela
You all have email.

The output of the Humidifier (AHU3) is 50.6% RH with the 'mister' spraying deionized water. Don't think that's a coincidence. The DDC pgm. must be involved to make the humidity "50%" - which is...

Haven't been with OE since the 'big layoff' in JAN14. Their products are not 'smoke & mirrors' - proven technology with patented algorithms. Also, smart engineering/mtg. team that continually drive...

We have asked Siemens for the SOO many times - 'radio silence'. Besides the SOO logic, we would at least like to know the default setpoints.
We checked the clients documentation library for the SOO...

Basically yes. I'd say about 80% of the energy savings is just from using VFDs. The other "20%" comes from the patented control logic.
Traditional DDC strategies + VFDs can yield savings close to...

The site is in Germany. I converted C to F quicker understanding. The first task to command the humidifier reheat pump & valve to verify that they work (can't assume anything). Next is to lower...

Visited a major datacenter who's having 'issues' with humidity that's above 50%. The datacenter staff wants the humidity to be 50% and below. The system consists of an AHU who's supply air is feed...

Optimum Energy (my previous employer) has an algorithm called "Valve Orifice Method" - uses the various AHU valve positions to control the chiller water pump speed. It's a 'clever' algorithm & it's...

lwarren -
you have email.

That sounds like a poor 'coupling' issue. An example of coupling is saying that the building load is proportional to the dP sensor in the chiller loop. To a point it is. So that dP sensor is the...

From years doing Energy & Sustainability studies, controls are the 'heart & soul' of energy conservation (I'm an ex DDC tech).
For basic charts, the top one for me is to trend the chiller power...

Years ago the DDC techs were pulling out their hair trying to tune a very large AHU (new city hall, San Jose, CA).
I suggested using the Ziegler & Nichols Tuning Method. Read about it in one of the...

I penned the thread using my smarty iPhone Mini12. I used acronyms to cut back on the frustration of 1-finger typing and the double, triple frustration of correcting and recorrecting misspellings...

Just curious per JCI's "$51M" ransomware attack (Asia branch). When I inform my IT co-workers that it was allegedly a WIN Domain Controller breach I just wait for the reaction which is pretty much...

Tosibox is great in itself but watch out for the data plan provider. Tosibox was used for major DDC code updating - we had a 1GB/mo plan (Global, $180/mo). The provider charges $1/MB if U exceed...

During a pre-energy audit of a BAS system (Germany) we discovered that the login screen had general facility data.
(really useful - got basic info without locating the person with the user/pswd...

During the (crazy) Covid days I set up a Tosibox for the US control team to communicate with HON WEBs T-boxes (located in Asia). Word of caution - setup 'safeties' on the max. monthly data limit. ...

Any thoughts on Dual Duct VAV box design? In theory the design is supposedly the best for accurate temp. control. Never came across one - just single-duct VAV design.

Pondering this matter a bit more - the bigger topic is IAQ. Besides the 'right' ventilation rate (min & max) proper filtering is the other IAQ concern. Just picked up a new term from ASHRAE: Airborne...

Attached is the AX History Chart Builder step-by-step process that AutomatedHVAC mentioned. My Tridium tech days ended at 3.7.106. Curious if the process is the same in 4.1x.

BRAVO!!! Well said "ss120396". "Internal loads are so low these days..." - interesting.:cheers:

There's company documentation and there are operators who have to use the BMS. The company document docs typically don't make it easy for the operator to do his/her job.
Attached is an R4xx...

The exhaust system was adjusted (TAB team verified balancing). Of course, this adds more cost, but the ECM (Energy Conservation Measure) can be reasonably paid back if the AHU speed is high when the...

I posted this thread two weeks in the "Energy" forum. Not a single reply (I'll reserved judgment on that forum).

"Years ago I implemented the ASHRAE Ventilation Rate Procedure (VRP) to lower the...

What is the EBI version? R300? R400? Does the nework use a BNA? a i600? admin passwords are most likely in the hands of the local HON office.

& what happen 2 ‘LonBoy’? His profile says ‘off-line’. ???

Years ago I implemented the ASHRAE Ventilation Rate Procedure (VRP) to lower the min. AHU CFM at a 4-story classroom (modified the VAV Min. Setpoints). The retrofit was guided by an 'energy...

This thread began with configurable I/O. Going back to I/O there's a cool feature in Niagara/JACE called 'BACnet Export Table'. So 'BACnet' does have its 'halo'... :angel: See attached.

Time travel: see Tread "BACnet vs. LON" (01-08-2006). Sysint gives it a rip (looks like he got 'kicked to the curb').
Each technology 'jump' is the result of the limitations of the current 'state of...

Interesting thread-talk on 'low complexity' Modbus. I've mainly seen it/used it with electrical metering. Get to play with HI & LO registers and such. It works - just like LON and BACnet. In...

IP networking fundamentals are becoming pretty important. A bare minimum training is attached. This will help tremendously with figuring out BBMD, FDR, and NAT situations.

You might consider doing...

For logic on lead-lag go to page 34 of the NWG I sent you back in August (instruction on creating a Control Composite).
If you really want to learn lead-lag get yourself a few relays, timers, a...

The classrooms were at a military language school. A senior USACE engineer (one with the 'halo'), who ran the energy saving recommissioning project, called the shot to reduce the min. VAV CFMs. When...

After resolving whether to mess with static pressure reset, take a look at the AHU speed when most of the VAV boxes are at the setpoint - at Min. CFM. If the AHU/CFM is too high you're...

No freebies for newbiees - contribute more posts.

Did some looking at Black Box. They've got an RS-485 to fiber converter (no surprise there).
...

Thanks Digo for the Spyder PID info. I recently took a HON Spyder course (Cochrane Tech Services, Madison Heights, MI) and I brought up the PID -200% - 200% issue. The instructor recommended the...

What about communicating actuators? Will there be a day where the whole job is 100% communicating sensors & actuators. Maybe it has happened (?). The idea of plugging into a sensor/acutator and...

In Niagara the "PID" block is called "Loop Point" (palette 'KitControl/HVAC') . In Honeywell Spyderland you've got two PID blocks: "PID" & "ANA" (Adaptive Integral Action).
Last summer I did a...

As a past controls PM you are definitely concerned about the bottom line. Some of the ‘line’ has to support the low-voltage electrician to install/wire up the field devices. You can flip a coin...

Caspar -
You have email. I normally do not pass out my NWG to Hvac-talk 'newbies' - you seem to a 'special' case. To truly learn Tridium you'll have to have a JACE (Web Controller) and a N4...

I think the 'tech spec' for LON is 2V peak-2-peak. Attached is a similar screen capture using a portable o-scope. LON was behaving periodically 'strange' at one floor - getting an alarm at the...

Joke's on me, I guess. :grin2:

Not sure about the 'toothy' Emoji (?) it's ":D" after the A
Dir/A:D/O:N/W |more

Back in the day I use to say "Boss your DOS". Went into the 'file dungeon' and dug up some DOS batch files I made to quickly look at directories and files.
Dir/A:D/O:N/W |more
Dir/O:N/P...

The 'campus' for that HON WEBs upgrade project was 12 buildings. 10 bldgs. were single floor (1AHU + 1 AC Chiller); 2 bldgs. were 2 floors (2AHU + 1 AC chiller). The DDC contractor's graphics had a...

Orion242 'wins' the point on semantics. In another DDC upgrade job (from old non-IP gear to IP gear) the controls contractor used HON WEBS controller (+ Spyder controllers). The graphics were at...

That mil-job contract upgraded the old (non-IP) DDC gear to Loytec L-INX Automation Servers (mdl. LINX-215). The local shop called me to help out connecting to the new L-INX at the dining hall...

Attached is a network diagram I made for the HVAC supervisor at the San Jose Civic Center (SJCC) - the job goes back to 2005-06 days. It was a HON LON job which used iLON 600 IP Servers (the IT...

Not really a 'semantics' issue...it could be seen that way. By "GUI" I'm referring to the proprietary graphics software that come with the BAS software. For HON EBI the graphical interface was...