SICK DAX Threaded Kurzanleitung Seite 13

ured signals are programmed in the controller accordingly. When operating the
device without teach-in, please note the following tolerance-related information:
Tolerances for operation without teach-in
Example for a measuring range of 400 mm
Sensor output
Signal
Range
Zero end point ± 1.0 mm
Position magnet ± 1.0 mm
Mechanical assembly ± 0.5 mm
Total of all tolerances ± 2.5 mm
Zero end point
Example for a measuring range of 400 mm
Sensor output
Signal
Zero point
Min. zero point
Max. zero point
End point (F.S)
Min. end point
Max. end point
After installation of the encoder in the cylinder, deviations from the target values
will arise due to these permissible tolerances. These deviations must be taken
into consideration when setting limit values in the controller:
Deviation from the limit values
Typical values
200 mm
Output signal
Analog V DC ± 50 mV
Analog mA ± 0.20 mA
CANopen® ± 25 digits
6.2 Commissioning the linear encoder (analog)
• Check that the electrical connectors have been connected correctly
Analog M12, 5-pin, page 12
• Select a suitable fuse: see "Select a suitable fuse"
fuse, page 13
• Select the terminator, if applicable
• Set up the filter wiring: see "Set up the filter wiring - analog"
filter wiring (analog), page 13
• Put the device into operation
6.2.1 Select a suitable fuse
When selecting a suitable fuse, the transient peak current when switching on the
device for the time must be taken into consideration:
Start-up current for a supply voltage of 24 V DC: typ. 5.0 A / 50 μsec
6.2.2 Set up the filter wiring (analog)
Thermal noise, for example from resistors, becomes evident when the signal
output is amplified sufficiently. The supply voltage ripple and other sources of
interference, e.g., electromagnetic interference, can also affect the quality of the
analog output signal. To reduce the smoke suppression when acquiring analog
measurement data, it is essential to use a filter. A combination of R1 = 50 Ω and
C1 = 100 nF to 1 μF is suitable, for example.
This will keep the signal delay time within the cycle time (internal measurement
frequency) while not changing the dynamic behavior significantly.
8028139/1LXF/2023/12/01/de, en
Analog V DC Analog mA CANopen®
0 ... 10 V 4 ... 20 mA PDO telegram
10,000 mV 16 mA 4,000 digits
± 25 mV ± 0.04 mA ± 10 digits
± 25 mV ± 0.04 mA ± 10 digits
± 13 mV ± 0.02 mA ± 5 digits
± 63 mV ± 0.10 mA ± 25 digits
Analog V DC Analog mA CANopen®
0 ... 10 V 4 ... 20 mA PDO telegram
± 63 mV ± 0.10 mA ± 25 digits
-0.063 V 3.9 mA 275 digits
+0.063 V 4.1 mA 325 digits
± 63 mV ± 0.10 mA ± 25 digits
9.937 V 19.9 mA 3,975 digits
10.063 V 20.10 mA 4,025 digits
Cylinder stroke (mm)
400 mm 800 mm
Tolerances
± 25 mV ± 12.5 mV
± 0.10 mA ± 0.05 mA
± 25 digits ± 25 digits
see Select a suitable
see Termination (analog), page 13
see Set up the
Figure 18: Filter wiring
NOTICE
The A/D converter at the input of the installed electrical controller will deter‐
mine the resolution of the encoder, e.g.,:
• 8 bit = 256 steps
10 bit = 1,024 steps
•
• 12 bit = 4,096 steps
6.2.3 Termination (analog)
For the analog sensor with two outputs, both outputs must be terminated, regard‐
less of whether both or only one signal are evaluated.
6.2.4 Analog interface details
For more detailed information on the analog interface, please refer to the relevant
technical Information at www.sick.com/DAX®. You can find the information in
the download area of the relevant part number. To do so, enter the product part
number in the search field (part number: see the "P/N" or "Ident. no." field on the
type label).
6.3 Commissioning the linear encoder (CANopen®)
6.3.1 EDS file
An EDS file is available to make connecting the DAX® CANopen® to a CANopen®
controller easy (it can be found at www.sick.com/DAX®). To do so, enter the
product part number in the search field (part number: see the entry in the "P/N"
or "Ident. no." field on the type label).
6.3.2 Bus termination (CANopen®)
Data transmission in the CAN bus is serial (2-wire bus system). The voltage
difference between the CAN_HI and CAN_LO data lines is one bit of information.
see
To prevent signal reflections, the data lines must be terminated with a 120 Ω ter‐
minator on the open bus end. The terminator must be inserted between CAN_HI
and CAN_LO.
VDC
+
CAN_HI
CAN_LO
GND
Figure 19: Bus termination
6.3.3 Node ID/baud rate
The following requirements must be met for communication with the controller: A
correct node ID must be configured at the DAX® CANopen®.
The following are correct:
• A node ID that is unallocated in the CANopen® network
• A node ID that the controller expects
The DAX® CANopen® must be set to the same baud rate as the master.
The following parameters are set at the factory for the DAX® CANopen®:
• Node ID: 127 (7F)
Baud rate: (type-dependent according to device configuration)
•
6.3.4 Communication objects
When the device is in operational mode, the control unit integrated into the device
convert the measurement data into CAN messages, and transmit these messages
on the CAN bus. They can be received and processed by the controller there. The
CAN bus uses the following communication objects for data transmission:
SDO (Service Data Object):
• SDOs are used to set and query parameters relating to the encoder configu‐
ration. These are accessed from the internal object directory of the device.
To process SDOs, the device must be in either the pre-operational or opera‐
tional mode.
PDO (Process Data Object):
• PDOs transmit process data, such as position and speed, to the controller.
PDOs are only generated in operational mode.
NMT (Network Management):
ECU
DAX® | SICK 13