VLT ® 2900 Series The jog ramp time starts if a jog-signal is given via the LCP control panel, one of the digital inputs or the serial communication port. It is possible to define how preset references are to be added to the other references; for this purpose, use Sum or Relative . It is also possible by using the Exter- nal/preset to select whether a shift between external references and preset references is required. External reference is the sum of the analogue refer- ences, pulse references and any references from se- rial communication. Set the required ramp time.
If Sum [0] is selected, one of the adjusted preset ref- erences (parameters 215-218 Preset reference ) is summarized as a percentage of the reference range (Ref MIN - Ref MAX ), added to the other external referen- ces. If Relative [1] is selected, one of the added preset ref- erences (parameters 215-218 Preset reference ) is summarized as a percentage of the sum of present external references. If External/preset [2] is selected, it is possible via a dig- ital input to shift between external references or preset references. Preset references will be a percentage value of the reference range. 0.02 - 3600.00 sec.
3.00 sec (VLT 2903-2975) 10.00 sec (VLT 2980-2982) The quick-stop ramp-down time is the deceleration time from the rated motor frequency to 0 Hz, provided no overvoltage arises in the inverter because of gen- erating operation of the motor, or if the generated current exceeds the current limit in parameter 221 Current limit I LIM . Quick-stop is activated via one of the digital inputs or the serial communication. Set the required ramp-down time. NB! If Sum or Relative is selected, one of the preset references will always be active. If the preset references are to be without in- fluence, they must be set to 0% (factory setting). 0.0 - Par.
202 Output frequency high limit, f MAX 10.0 Hz Jog frequency f JOG means a fixed output frequency that the frequency converter supplies to the motor when the Jog function is activated. Jog can be activa- ted via the digital inputs, serial communication or via the LCP control panel, on the condition that this is ac- tive in parameter 015 Local jog . -100.00% - +100.00% 0.00% of the reference range/external reference Set the required frequency. Four different preset references can be programmed in parameters 215-218 Preset reference .
The preset reference is stated as a percentage of the reference range (Ref MIN - Ref MAX ) or as a percentage of the other external references, depending on the choice made in parameter 214 Reference function . The choice between preset references can be made via the digital inputs or via serial communication. Sum (sum) [0] Relative (relative) [1] External/preset (external/preset) [2] = factory setting, () = display text, [] = value for use in communication via serial communication port 32 MG.29.A3.02 - VLT ® is a registered Danfoss trademark Function: Description of choice: 212 Quick-stop ramp-down time (Q STOP RAMP TIME) Value: Description of choice: Function: Description of choice:
213 Jog frequency (Jog frequency) Value: Function: 215 Preset reference 1 (PRESET REF. 1) 216 Preset reference 2 (PRESET REF. 2) 217 Preset reference 3 (PRESET REF. 3) 218 Preset reference 4 (PRESET REF. 4) Value: Description of choice: Function: 214 Reference function (Ref function) Value: