HBM PW15AHi, Инструкция по монтажу, Страница: 21 / 72

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PW15AHi
A2526-4.0 en/de/fr HBM
Fig. 7.3 DeviceNet bus wiring
IMPORTANT
The PW15AHi CAN bus driver relates to GND. The Master CAN bus driver
must also relate to this GND.
Baud rate and bus cable lengths
The table below gives the maximum cable lengths for the DeviceNet bus, subject to
the baud rate:
Baud rate [kBits/s] 125 250 500
Max. cable length [m] 500 250 100
The max. cable length is the total line length, calculated from the length of all
the stub lines per node (bus nodes) and the line length between the nodes.
The length of the stub lines per node is limited, and depends on the baud rate
being used (see additional DeviceNet documentation:
DeviceNet Specification
Volume 1, Appendix B, cable profiles ). When using the PW15AHi's CAN wiring
with CAN_In and CAN_Out lines, the length of the stub line to the PW15AHi is
equal to zero. If only one connection pair (CAN_In or CAN_Out) is used, the
cable length of the PW15AHi counts as the stub line.
Setting the address
The address is set via the bus:
DeviceNet: 1...63 (default on delivery: 63)
Setting the bit rate
The bit rate is set with the fieldbus configuration tool via the bus; the factory
setting is 125 Kbits.
DeviceNet communication is explained in the Online Help, DeviceNet Commu­
nication description.