Integrating with Automated Logic

We have a mid size school district with six schools which are predominantly Automated Logic.
I’m currently working on a project replacing 7 Mammoth Multizone rooftop control packages.
The larger units have up to 12 zones, 36 UI 6 DO 16 AO.
Using a T3-8o to test bench the setup using a ALC router to Bacnet/MSTP.

Funny issues with the T3-8o. If I use the T3000 software over Ethernet, the MSTP network
stops communicating and the device shows as offline. Makes it a little difficult to change IO
config and confirm at the same time.

Another issue is the BAPI t’stats that exist on the job. 3 wire 10k-2 with warmer/cooler sliders. Try as I might, sharing the common from the sensor and the slider doesn’t seem to work. The T3 just reads 0. The slider is 15k to 35k. Using a meter, I see that every Space temp scan on the input brings the reading to a direct short on the slider input.

Sharing the common doesn’t appear to work. I’m looking for any input on how to accomplish this with the existing 3 wire system.

Thanks

For intermittent communications issues the only thing I can suggest is to be sure to update to the latest & greatest firmware for the device itself, you can do that under T3000 -> help -> check for updates -> download firmware and update device. While you’re at it do the same for the T3000 front end itself even if you dont normally use it to manage the system.

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For the MSTP issue, could you show me what you have set up here. There is a known issue with configuring two MSTP ports which we’re working on, for now only one MSTP subnet is supported at a time. You can also check the subnet network health as shown, have a look there for clues.

For the 3 wire issue, it should work fine to share the ground between the sensor and the slider. Send on a screen shot of what you have set up for the slider range. I would expect to see a custom table for something like below. The 35k resistor will need a pullup resistor for excitation voltage which is done by setting the range and signal type at Tab1. Then fill in the scaling from 0 to 3V for the slider, here I set it to provide an offset of plus 3 to minus 3 DegC/F.

Full scale voltage for the thermistor/dry contact is 3V, you’d have to know that to get this working which is a bit sneaky I admit. I’ll get the team to add a separate range to show resistance here soon.

2 posts were split to a new topic: Updating firmware