Input for reference cam signal (P-AXIS-00321)
At CNC controlled homing the reference cam signal is read by default from the PLC interface (se also [HLI]).
For some drive types it is possible to use the drive digital inputs as reference cam input. In this case the appropriate input must be configured in P-AXIS-00321.
If this parameter is not set the reference cam signal is red from the PLC interface.
 | If the drives digital inputs are used they have to be set up with the drive manufacturers setup tool.Also the transmission of the digital inputs in the cyclic telegram has to be configured. |
Dependent on the drive type the following different names for the digital inputs are possible.
Variable name | Type | Permissible range | Axis type | Dimension |
reference_cam_signal | ISG_CHAR | See strings at following table | T, R | ---- |
Drive type | String | Significance |
|---|---|---|
SERCOS (1) | PLC | Read reference cam signal from PLC (Default). |
| RT_STATUS_BIT_1 | Read reference cam signal from real time status bit 1. |
| RT_STATUS_BIT_2 | Read reference cam signal from real time status bit 2 |
CANopen (2) | PLC | Read reference cam signal from PLC (Default). |
| DIG_INPUT_1 | Read reference cam signal from digital input 1 |
| DIG_INPUT_2 | Read reference cam signal from digital input 2 |
| DIG_INPUT_3 | Read reference cam signal from digital input 3 |
| DIG_INPUT_4 | Read reference cam signal from digital input 4 |
Lightbus/RT-Ethernet (3) | PLC | Read reference cam signal from PLC (Default) |
| DIG_INPUT_1 | Read reference cam signal from digital input 1 |
| DIG_INPUT_2 | Read reference cam signal from digital input 2 |
| DIG_INPUT_3 | Read reference cam signal from digital input 3 |
| DIG_INPUT_4 | Read reference cam signal from digital input 4 |
(1) Usage of the real time status bits is possible only in combination with NC controlled homing, see also [CMS].
(2) For the transmission of the digital inputs in the cyclic telegram the latch state word must be configured. If it is not configured an error message with error code P-ERR-70292 is output.
(3) For the transmission of the digital inputs they must be configured in the cyclic telegram. If these are not configured an error message with error code P-ERR-70292 is output.