This is concerning a BACnet device (Hitachi HC-A 64BNP1) connected to a Schneider AS-P.
The above-mentioned devices are connected through BACnet IP and it consists of a number of value points from several thermostats combined together. However, when the status points were bound to a graphic or a program, the points do not show their real values. But points are unbound from graphics or a program, its real values are shown in the BACnet point list. (The point list is shown in the application section of a BACnet device.)
As an example, when all the points of a thermostat are bound to a graphic and the start command is given through the relevant BACnet point, the FCU connected to the said Thermostat starts working. But the running status point still shows as it’s Stopped. Even in the BACnet point list, it shows as Stopped. However, if the running status point is unbound from the graphic and when the point is checked in the BACnet point list, then it shows as it’s running.
We have checked every possible reason for this within our knowledge span. And we are at a loss in understanding a possible reason for this. We’re hoping that we would be able to get a much-advanced explanation and a solution for this from you.
We have attached herewith everything we have witnessed and all the details that can be important such as the software version etc… please inform us if there is any other detail that’s needed to understand and give a proper solution for this matter.
We are hoping to get consolatory feedback from you at your earliest. And your valuable time taken to look into this matter is very much appreciated.
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Thank you very much!
We have had a couple of cases where Hitachi BI values are not updating in EBO. I suspect there is an issue with the Hitachi device not updating it's COV values correctly.
I think you will need to create a case with your local support team to investigate this further. They will need a backup of your database and a wireshark capture taken while you are doing the steps in the video so that they can see what is happening between the devices.
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