| ASCII - Command | DREF | |||
| Syntax Transmit | DREF [Data] | |||
| Syntax Receive | DREF <Data> | Available in | ||
| Type | Variable rw | MMI | Yes | |
| ASCII Format | Integer8 | CANBus Object Number | 352C (hex) | |
| DIM | - | PROFIBUS PNU | 1644 (dec) IND = 1 (dec) | |
| Range | 0, 1, 2 | DPR | 44 (dec) | |
| Default | 0 | |||
| Opmode | 8 | Data Type Bus/DPR | Integer8 | |
| Drive State | - | Weighting | ||
| Start Firmware | 1.20 | |||
| Configuration | No | Last Change of this Object | 1.3 | |
| Function Group | Position Controller | EEPROM | Yes | |
| Short Description | Direction for Homing | |||
Description
| The DREF parameter can be used to define the direction of motion for a homing operation and for positioning with a modulo-axes (POSCNFG=2). | ||
| Status | Shortdescription | Description |
| DREF = 0 | Negative movement | A homing move is always started in the negative direction (-VREF). In case NREF = 4 and NSTOP limit switch is active (low level) the moving direction is positive. Using a modulo axes type a position is always searched in negative direction (is DIR=1, the target position is searched in the positive direction). |
| DREF = 1 | Positive movement | A homing move is always started in the positive direction (+VREF). In case NREF = 4 and PSTOP limit switch is active (low level) the moving direction is negative. Using a modulo axes type a position is always searched in positive direction (is DIR=1, the target position is searched in the negative direction). |
| DREF = 2 | Optimized movement | The shortest distance between the starting position and the zero pulse of the resolver is executed in Homing Mode No. 5 (NREF=5). When a modulo axis type is used the drive always moves in the direction of the shortest distance. |
| DREF = 4 | negative movement without reversing | >= version 6.43 DREF =4 homing direction negativ (like DREF=0),no positive movement on reference switch or limit switch This setting is only usefull for NREF=1,3. |
| DREF = 5 | potitive movement without reversing | >= version 6.43 DREF =5 homing direction positive (like DREF=0),no negative movement on reference switch or limit switch This setting is only usefull for NREF=1,3. |