BENSHAW RSi GM2 Series, Instruction Manual

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Learning Advanced Features
890054-00-00
GM2 Series VFD 105
Dwell Operation
The dwell operation is used to maintain torque (speed) at programmed frequencies during the
acceleration and deceleration process. This function is used in the application and release of the
mechanical brakes on lift-type loads (elevators). Inverter dwell operation is based on the Acc/Dec
dwell frequency (Ad.20, Ad.22) and the dwell time (Ad.21, Ad.23) set by the user. The following
points also affect dwell operation:
•
Acceleration Dwell Operation:
When a run command is applied, acceleration continues
up to the acceleration dwell frequency (Ad.20) and constant speed is maintained for the
acceleration dwell time (Ad.21, Acc Dwell Time). After the Acc Dwell Time has passed,
acceleration is carried out based on the acceleration time and the operating speed that was
originally set.
•
Deceleration Dwell Operation
: When a stop command is applied, deceleration continues
down to the deceleration dwell frequency (Ad.22) and constant speed is maintained for the
deceleration dwell time (Ad.23, Dec Dwell Time). After the Dec Dwell Time has passed,
deceleration is carried out based on the deceleration time that was originally set, then the
operation stops.
When dr.09 (Control Mode) is set to 0 (V/F), the inverter can be used for applications requiring the
use of dwell frequencies. An example is applying and releasing mechanical brakes on lift-type loads
(elevators).
Group Code Name Setting Setting Range Unit
Ad
20
Dwell frequency on
acceleration
5.00
Start frequency –
Maximum frequency
Hz
21
Operation time during
acceleration
0.0 0.0 – 10.0 sec
22
Dwell frequency during
deceleration
5.00
Start frequency –
Maximum frequency
Hz
23
Operation time during
deceleration
0.0 0.0 – 60.0 sec