SEW-Eurodrive MOVIPRO Ethernet/IP - 14.2 Reference travel after device or encoder replacement

14
Service
Reference travel after device or encoder replacement
Manual – MOVIPRO
®
with EtherNet/IP™ or Modbus/TCP Fieldbus Interface
246
14.2 Reference travel after device or encoder replacement
14.2.1 Incremental encoder
If incremental encoders are used for positioning, a reference travel must be performed
after device startup. This way, no special measures are required.
14.2.2 Absolute encoder
The device stores the position of absolute encoders with 32 bit. This allows for repres-
enting a larger absolute area than with an encoder with typical 12 bits in the single-
turn range and 12 bits in the multi-turn range.
Perform a reference travel if you replaced the encoder.
14.2.3 Linear encoder systems
If you replace an absolute linear encoder system without encoder overflow in such a
way that the encoder system provides the same values as before the replacement, a
reference travel is not required.
14.2.4 HIPERFACE
®
encoders
With HIPERFACE
®
encoders, you can use parameter P948 to specify whether or not a
reference travel is required after an encoder replacement.
14.3 Service unit
The service unit is used for startup, diagnostics and maintenance of the device. It is
equipped with a status display and an Ethernet service interface. The following figure
shows the service unit:
[1]
[2]
[4]
[3]
27021606021937419
[1] Service unit
[2] Status display
[3] Ethernet service interface (Ethernet RJ45)
[4] Status LEDs
The statusdisplay and status LEDs display status and error messages and thus en-
able you to record the current state of the device.
16998413/EN – 12/2016