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2 LSS Modes
Devices that communicate with the LSS protocol can be in one of two modes,
‘Configuration Mode’ and ‘Operation Mode’. Any device on the network that is not in
‘Configuration Mode’ is in ‘Operation Mode’. In ‘Configuration Mode’ all LSS services
are available. In ‘Operation Mode’ only the switch mode services are available.
Switching the mode of a device to ‘Configuration Mode’ must be explicitly initiated by
the LSS Master. Mode switching is independent of the NMT state. With the exception of
the LSS service ‘Configure Node-ID’ the NMT state of the device is not affected by LSS
services.
If the Node-ID of the LSS Slave is changed with the LSS service ‘Configure Node-ID’, and
the slave is switched back from ‘Configuration Mode’ to ‘Operation Mode’, a power-on
like reset must be performed by the LSS slave; this affects the NMT state. For this reason
the LSS-Master must reside on the same device that holds the NMT-Master.
2.1 Configuration and the Operation Modes
An LSS Slave can be in one of two LSS modes:
Configuration Mode
When an LSS Slave is in this mode, it actively listens for and processes
configuration commands from the LSS Master.
Some configuration commands configure only one LSS Slave at the time
(for example, to change of CANopen node ID)
Some configuration commands configure multiple or all LSS Slave nodes (for
example, to change the baud rate)
Operation Mode
An LSS Slave in this mode ignores the configuration commands from the LSS
Master.
CANopen DSP 305 Implementation Guide
MAN-CAN305IG (Ver. 1.1)
2-1