| 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...34 | DPR | 44 (dec) | |
| Default | 0 | |||
| Opmode | 8 | Data Type Bus/DPR | Integer8 | |
| Drive State | - | Weighting | ||
| Start Firmware | 1.0 | |||
| Configuration | No | Last Change of this Object | 1.0 | |
| Function Group | position loop | EEPROM | Yes | |
| Short Description | Direction for Homing | |||
Description
| The DREF parameter can be used to define the preferred direction of motion for a homing operation and for positioning with a modulo-axes. Bits 0..3 are used for homing, Bits 4..7 for modulo-axis (POSCNFG=1). The possible combinations are shown in the table. If a homing mode with zero puls is selected DREF should be set to 2,18 or 34. See also POSCNFG |
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| Homing - Direction | Modulo - Direction | |
| DREF = 0 | negative | negative |
| DREF = 1 | positive | negative |
| DREF = 2 | shortest distance | negative |
| DREF =4 | negative movement without reversing | >= version 1.30 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 1.30 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. |
| DREF = 16 | negative | positive |
| DREF = 17 | positive | positive |
| DREF = 18 | shortest distance | positive |
| DREF = 32 | negative | shortest distance |
| DREF = 33 | positive | shortest distance |
| DREF = 34 | shortest distance | shortest distance |