Fan motor ramp up - Printable Version +- Logic Machine Forum (https://forum.logicmachine.net) +-- Forum: LogicMachine eco-system (https://forum.logicmachine.net/forumdisplay.php?fid=1) +--- Forum: Scripting (https://forum.logicmachine.net/forumdisplay.php?fid=8) +--- Thread: Fan motor ramp up (/showthread.php?tid=3873) |
Fan motor ramp up - KoBra - 14.02.2022 I am trying to control fancoils with 0-10V EC motors. There is no actual load on the actuator but they make noise if i apply from one to another moment 100% (10V) to the controller. Basically i have the fan speed where i need to go to, but i need a ramp up/down script (of FB editor building block) so if i change from 0>10V i must ramp up from 0>10V in 10 seconds for example. Anyone an idea how to do this in a convenient way? (i searched the forum but it seems no one ever dealt with this issue) RE: Fan motor ramp up - Dré - 14.02.2022 maybe this is wha tyou are looking for? This example will dim 3 lights from 0% to 100% in 10% steps with 0.2 seconds delay between each step. You can adjust the step/delay as needed and also add new group addresses to the list. RE: Fan motor ramp up - KoBra - 16.02.2022 (14.02.2022, 18:31)Dré Wrote: maybe this is wha tyou are looking for? Thanks, that is already something. But i tried and it just goes from 0-100 in a loop. (sorry noob in scripting) Basically i calculate the set point of the fan speed based on room temp, offset to target and a minimal fanspeed. The target is adjusted when the room goes from Standby to Comfort in KNX but it can happen during a mode change the fan goes from 0-100% at once. I send this on address 2/1/9 but if i send out the setpoint at once (lets say 100%) the fans don't like the torque the electric EC motor makes. As the analogue output sends 10V at once towards the FCU To avoid the big starting torque i need to ramp up and down the fan to make sure the motors last longer where the setting step = 1 delay = 0.1 works perfectly but i just don't want a loop When turning off it is the other way around. If a fan would be at 100% and go of (but this is a much rarer case) you could get a spike in the control voltage as the motor becomes a generator at once. RE: Fan motor ramp up - admin - 16.02.2022 Event script that gets the target level and adjusts the output object in small steps. Adjust as needed: Code: output = '1/1/4' RE: Fan motor ramp up - KoBra - 16.02.2022 (16.02.2022, 07:12)admin Wrote: Event script that gets the target level and adjusts the output object in small steps. Adjust as needed: Thanks! Works perfectly! Would recommend to note this somewhere as a standard script for EC fancontrol (0-10V controlled fans) RE: Fan motor ramp up - admin - 16.02.2022 A proper solution would be to use an analog output that has a transition time setting. Reactor LMs with analog outputs have this out of the box. RE: Fan motor ramp up - KoBra - 16.02.2022 (16.02.2022, 08:45)admin Wrote: A proper solution would be to use an analog output that has a transition time setting. Reactor LMs with analog outputs have this out of the box. I agree but in this case this functioniert is Not available on the AO module. I also use this Funktion to send a Control percentage by modbus to LG AHU supply air controllers. |