| ASCII - Command | GVFBT | |||
| Syntax Transmit | GVFBT [Data] | |||
| Syntax Receive | GVFBT <Data> | Available in | ||
| Type | Variable rw | MMI | Yes | |
| ASCII Format | Float | CANBus Object Number | 3549 (hex) | |
| DIM | Milliseconds | PROFIBUS PNU | 1673 (dec) IND = 1 (dec) | |
| Range | 0.0 .. 30.0 | DPR | 73 (dec) | |
| Default | 0.4 | |||
| Opmode | 0, 1 | Data Type Bus/DPR | Integer32 | |
| Drive State | - | Weighting | 1000 | |
| Start Firmware | 1.20 | |||
| Configuration | No | Last Change of this Object | 1.8 | |
| Function Group | Velocity Controller | EEPROM | Yes | |
| Short Description | Velocity Control Loop: Time Constant First Order Tacho Filter | |||
Description
| If necessary, the time constant for the PT-1 filter in the actual velocity feedback is altered (default=0.6 ms). This may improve the step response and smoothness of running, particularly for very small, highly dynamic motors. If the GVFBT value is set too low, the motor runs roughly. If the GVFBT value is set too high, the velocity control becomes soft and unstable. |