VLT ® 2900 Series Min. reference - Max reference (min - max) [0] Par. 100 Config. = Open loop [0].Par. 204 Ref MIN - 1000.000 Hz -Max. reference - Max. reference (-max - +max) [1] 50.000 Hz Par. 100 Config. = Closed loop [1]/[3]. Par. 204 Ref MIN - Par. 415 Max. feedback In this parameter you select whether the reference signal must be positive or whether it can be both pos- itive and negative. The minimum limit may be a nega- tive value, unless in parameter 100 Configuration a selection has been made of Speed regulation, closed loop . You should select Min ref. - Max. ref. [0], if Proc- ess regulation, closed loop [3] has been selected in parameter 100 Configuration .
The maximum reference gives the highest value that can be assumed by the sum of all references. If Closed loop [1]/[3] is selected in parameter 100 Configuration the maximum reference cannot exceed the value in parameter 415 Maximum feedback . Maximum reference is ignored if the local reference is active. 50.000 rpm/par 416 Select the required range. The reference unit can be defined from the following table: Par. 100 Config. = Open loop [0].-100,000.000 - par. 205 Ref MAX Maximum reference is set, if the speed of the motor is to be max. the set value, regardless of the whether the resulting reference is greater than the maximum ref- erence. 0.000 Hz Par. 100 Config.
= Closed loop [1]/[3].-Par. 414 Mini- mum feedback - par. 205 Ref MAX 0.000 rpm/par 416 Minimum reference is an expression of the minimum possible value of the total of all references. If in pa- rameter 100 Configuration , Speed regulation, closed loop [1] or Process regulation, closed loop [3] is selec- ted, the minimum reference is limited by parameter 414 Minimum feedback . Minimum reference is ignored if the local reference is active. Linear (Linear) [0] Sin shaped (SIN SHAPED) [1] Sin 2 shaped (S-SHAPED 2) [2] The reference unit can be defined from the following table: You can choose between a linear, an S-shaped and an S 2 ramp process.
Select the required ramp type depending on the re- quired acceleration/deceleration process. The minimum reference is preset if the motor has to run at a minimum speed, regardless of whether the resulting reference is 0. = factory setting, () = display text, [] = value for use in communication via serial communication port 30 MG.29.A3.02 - VLT ® is a registered Danfoss trademark 203 Reference range (REFERENCE RANGE) Value: 205 Maximum reference, RefMAX (max.reference) Value: Function: Function: Description of choice: Par. 100 Configuration Unit Open loop [0] Hz Speed reg, closed loop [1] rpm Process reg, closed loop [3] Par. 416 204 Minimum reference, Ref MIN (Min.reference) Value:
Description of choice: Function: 206 Ramp type (Ramp type) Value: Function: Par. 100 Configuration Unit Open loop [0] Hz Speed reg, closed loop [1] rpm Process reg, closed loop [3] Par. 416 Description of choice: Description of choice: