User Manual

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03.19
3.3.6.2 Layer Setting Services
In the spring of 2000, CiA drafted a new protocol intended to ensure standardized occurrence. The
procedure is described under
Layer Setting Services and Protocol, CiA Draft Standard Proposal 305 (LSS).
The sensor is supplied by us as standard with the node ID 1 and a baud rate of 50 kBaud. Several sensors
can be connected to the bus system with the same node ID. To allow individual sensors to be addressed,
LSS is used.
Each sensor is fitted with its own unique serial number and is addressed using this number. In other words,
an optional number of sensors with the same node ID can be connected to one bus system, and then
initialized via LSS. Both the node ID and also the baud rate can be reset. LSS can only be executed in the
Stopped Mode.
Message structure
COB ID:
Master  Slave : 2021 = 7E5h
Master  Slave : 2020 = 7E4h
After the COB ID, an LSS command specifier is transmitted.
This is followed by up to seven attached data bytes.
COB ID
cs
Byte 1
Byte 2
Byte 3
Byte 4
Byte 5
Byte 6
Byte 7
Switch Mode Global
7E5h 
04h
Mode
reserved
Mode : 0  Operation mode
1  Configuration mode
Selective switch mode
The following procedure can be used to address a certain sensor in the bus system.
7E5h 
40h
Vendor ID
reserved
7E5h 
41h
Product code
reserved
7E5h 
42h
Revision number
reserved
7E5h 
43h
Serial number
reserved
7E4h 
44h
Mode
reserved
Vendor ID : ECh
Product code : Internal product code for the respective sensor
Revision number : Current revision number of the sensor
Serial number : Unique, consecutive serial number
Mode : The sensor's response is the new mode (0=operating mode; 1=configuration mode)