SICK MAX Series

Table 23: Setting the baud rate
Data source COB-ID Data Destination
Controller 0x7e5 04; 01; 00; 00; 00; 00; 00; 00 Sensor
Controller 0x7e5 13; 00; 02
*
; 00; 00; 00; 00; 00 Sensor
Sensor 0x7e4 13; 00; 00; 00; 00; 00; 00; 00 Controller
*
Table index
The baud rate becomes active after saving the changes, and the next time the encoder
is switched on. To save the baud rate, the following command must be sent:
Table 24: Saving the baud rate
Data source COB-ID Data Destination
Controller 0x7e5 17; 00; 00; 00; 00; 00; 00; 00 Sensor
Sensor 0x7e4 17; 00; 00; 00; 00; 00; 00; 00 Controller
6.9.2 Configuring SAE J1939
In the SAE J1939 specification, the maximum length of the network is limited to
40 meters, and the baud rate is fixed at 250 kBit/sec. It is therefore not necessary to
configure these parameters when integrating the device. Furthermore, the number of
nodes is limited to 30 ECUs (Electronic Control Units). Each ECU can, however, control
multiple CAs (Controller Applications). Up to 253 CAs in total can be implemented in the
network.
NMT (Network Management)
SAE J1939 supports extended network management. This requires subscribers to first
register themselves in the network with a unique address prior to system startup
(address claiming). Normal bus operation is only started after all subscribers have suc‐
cessfully logged in. Correct address assignment is checked continuously during opera‐
tion. A new source address can be assigned during operation. In addition to the source
address, every bus subscriber is provided with a unique name to identify it within the
network and to prioritize the allocation of addresses. The naming conventions are
defined in SAE J1939 and are structured as follows:
Table 25: Naming structure for subscribers according to J1939
Byte 0 Byte 1 Byte 2 Byte 3 Byte 4 Byte 5
Identify
Number
Manufacturer Code ECU Instance Function
Table 26: Naming structure for subscribers according to J1939
Byte 6 Byte 7
Reserved Vehicle System Vehicle System
Instance
Industry Group Arbitrary Address
Capable
Table 27: Setting the source address
Data source COB-ID Data Destination
Controller 0x10ff54d4 01; nSA
*
; 23; 01; 20; 07; 00; 00 Transducer
Transducer No response Controller
*
nSA: new source address
COMMISSIONING 6
8022793/ZXZ4/2018-07-24 | SICK O P E R A T I N G I N S T R U C T I O N S | MAX
33
Subject to change without notice