VLT ® 2000 Series I 210 Warning: frequency low (LOW FREQ WARN) Value: 0 - 500 H Z ✭ 0 Hz I 215 Ramp-up time 1 (RAMP UP TIME) Value: 0.1 - 800 seconds ✭ 5 s Description of parameters Function: Using this parameter you can set a value for when alarm must be given for f LOW within the normal operational range of the VLT frequency converter. Function: Using this parameter you can record the required acceleration time from 0.1 Hz to the rated output frequency (parameter 105). Description: If the output frequency falls below the warning limit f LOW , the display shows: LOW FREQ ALARM. You can also choose to program the signal outputs in parameters 408 and 409 to give a signal. Description:
To ensure the fastest possible start, choose a value for the ramp-up time so that the current limit is not activated. The ramp-up time is always defined as the acceleration time from 0 Hz to the rated motor frequency. I 211 Warning: frequency high (HI FREQ WARN) Value: 0 - 500 Hz ✭ 120 Hz Section 1 Section 2 Section 3 I 216 Ramp-down time 1 (RAMP DOWN TIME) Value: 0.1 - 800 seconds ✭ 5 s Function: Using this parameter you can set a value for when alarm must be given for f HIGH within the normal operational range of the VLT frequency converter. Function: Using this parameter you can record the required de- celeration time from rated output frequency to 0 Hz. Description:
If the output frequency exceeds the warning limit f HIGH, the display shows: HI FREQ ALARM. You can also choose to program the signal outputs in parameters 408 and 409) to give a signal. Description: The ramp-down time can be selected in the range 0.1-800 seconds. If the ramp-down time is too short the VLT’s voltage limit becomes active, which will extend the ramp-down time. Short ramp-down times will require a VLT unit with a brake function and installation of a brake resistor. The ramp-down time is always defined as the deceleration time from the rated motor frequency to 0 Hz. I 213 Warning: current high (HI CURR WARN) Value: 0.0 - I VLT,MAX ✭ I VLT,MAX Function:
Using this parameter you can set a value for when alarm must be given for I HIGH within the normal operational range of the VLT frequency converter. I 218 Quick stop ramp (ALT: DOWN RAMP) Value: 0.1 - 800 seconds ✭ 1 s Description: If the output current exceeds the warning limit I HIGH the display shows: HI CURR ALARM. You can also choose to program the signal outputs in parameters 408 and 409 to give a signal. Function: Using this parameter you can choose an alternative deceleration ramp - a programmable quick stop ramp. Description: The ramp-down time can be selected in the range 0.1-800 seconds, calculated from the rated frequency to 0 Hz.
If the ramp-down time is too short the VLT’s voltage limit becomes active, which will extend the ramp-down time. Short ramp-down times will require a VLT unit with a brake function and installation of a brake resistor. ✭ = Factory setting. Text in ( ) = Display text. The figures in [ ] are used in bus communication. MG.20.B6.02 – VLT is a registered Danfoss trademark 69