Group 21: Start/Stop
This group denes how the motor starts and stops. The ACH550 supports several start and stop modes.
Table 33: Group 21: Start/Stop
Code Description Range Resolution Default S
2101 START FUNCTION 1...8 1 1
Selects the motor start method.
1 = AUTO – The drive starts the motor instantly from zero frequency. If ying start is required, use selection SCAN START.
2 = DC MAGN – The drive pre-magnetizes the motor with DC current before the start. The pre-magnetizing time is dened by parameter 2103 DC MAGN TIME.
Note: Starting to a rotating machine is not possible when DC MAGN is selected.
WARNING! The drive will start after the set pre-magnetizing time has passed even if the motor magnetization is not completed. Ensure always in
applications where a full break-away torque is essential, that the constant magnetizing time is long enough to allow generation of full magnetization
and torque.
4 = TORQ BOOST – Torque boost should be selected if a high break-away torque is required. The drive pre-magnetizes the motor with DC current before the
start. The premagnetizing time is dened by parameter 2103 DC MAGN TIME. Torque boost is applied at start. Torque boost is stopped when output frequency
exceeds 20 Hz or when it is equal to the reference value. See parameter 2110 TORQ BOOST CURR.
Note: Starting to a rotating machine is not possible when TORQ BOOST is selected.
WARNING! The drive will start after the set pre-magnetizing time has passed although the motor magnetization is not completed. Ensure always in
applications where a full break-away torque is essential, that the constant magnetizing time is long enough to allow generation of full magnetization
and torque.
6 = SCAN START – Frequency scanning ying start (starting to a rotating machine). Based on frequency scanning (interval 2008 MAXIMUM FREQ…2007
MINIMUM FREQ) to identify the frequency. If frequency identication fails, DC magnetization is used (see selection DC MAGN).
7 = SCAN + BOOST – Combines scanning start (starting to a rotating machine) and torque boost. See selections SCANSTART and TORQ BOOST. If
frequency identication fails, torque boost is used.
2102 STOP FUNCTION DO NOT CHANGE!! Factory set to Coast. 1, 2 1 1
Selects the motor stop method.
1 = COAST – Selects cutting off the motor power as the stop method. The motor coasts to stop.
2 = RAMP – Selects using a deceleration ramp
• Deceleration ramp is dened by 2203 DECELER TIME 1 or 2206 DECELER TIME 2 (whichever is active).
aCTual sIgnals and parameTers
www.DaikinApplied.com 49 OM 1190-1 • MD4 VFD
To Next Page
Need help?
General
