I am trying to see if the PS-1-0-0 is capable of controlling a damper with the anolog output on board. I have the system going to a bms system on the BACnet. I am trying to command a bypass damper from the anolog out. I can do the programming on the BMS controller if I could just send out a signal from the analog out.
Lijun will be here shortly to show this in more detail but here is the general idea:
-Configure the input, 0-10V pressure sensor.
search this forum for ‘custom analog input’ for more info on this.
-Create a variable for the setpoint, use the same units as the pressure sensor input.
-Add the input and the setpoint into one of the PIDs
you’ll have to experiment with the ‘sense’ of the PID, depending on how the pressure responds to the damper motion.
-Do a program:
10 OUT1 = PID1
I can’t seem to keep my changes to the inputs. They are already populated temp. Humidity and CO2. I do have a Pressure on In4 but I cannot Change the others
Show the communications health down at the bottom left of the T3000 software, it should show the packets and how many are getting through.
The PS-1-0-0 is not a programmable controller. Its INPUT cannot be modified, and the relationship between its analog output and pressure is fixed. For example, if the range of the PS-1-0-0 is 0-100 PSI, it will output 10V at 100 PSI.
If you can program the BMS controller, then there is a way to control the output of PS-1-0-0.If you want to return to automatic output mode, just write register 1250 to 0.
In Modbus mode, write 7 to register 1250, enter manual output mode, and write the desired output voltage to register 1253, 0-1000 represents 0-10V.
As I understand it, you would like to write to the analog output of the PS pressure sensor using bacnet. We could add a feature to allow that, Lijun will work on it.
Hey Lijun
Any chance you have had a chance to look at this.
Update this new firmware and change the value of BACNET object AV17 (SPLIT_IO) to 1 to enter manual output mode. You can then write the output value on AO1 (PESUR_AO), 0-1000 corresponds to 0-10V output.
Change the value of AV17 back to 0 to return to automatic output mode, and the output still corresponds to the pressure value.
PM25_CO2_HUM_RESSURE_REV126.hex (761.9 KB)
