Lenze E94ARNE Regenerative power supply - Manual (Page 106)

9400 regenerative power supply module | Parameter setting
"CAN on board" system bus
Structure of the CAN data telegram
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EDS94ARNExxxx EN 2.3 - 06/2014
6.4.2 User data
The nodes communicate with each other by exchanging data telegrams via the system
bus. The user data range of the CAN telegram contains network management data,
parameter data or process data:
Network management data
(NMT data)
 Control information on start, stop, reset, etc. of communication to certain or all nodes
of the CAN network.
Process data
(PDOs – Process Data Objects)
 Process data are transferred via the process data channel.
 Process data can be used to control the regenerative power supply module.
 Process data are not stored in the regenerative power supply module.
 Process data are transferred between the host system and the nodes to ensure a
continuous exchange of current input and output data.
 Process data usually are unscaled/scalable raw data.
 Process data are, for instance, setpoints and actual values.
Parameter data
(SDOs – Service Data Objects)
 Parameter data are the CANopen indexes or, in case of Lenze devices, the so-called
codes.
 Parameter settings are, for instance, necessary for one-off plant setting during
commissioning or when the material is changed on a production machine.
 Parameter data are transmitted as SDOs via the parameter data channel. They are
acknowledged by the receiver, i.e. the sender gets a feedback about the transmission
being successful or not.
 The parameter data channel enables access to all Lenze codes and CANopen indexes.
 Parameter changes are automatically stored in the regenerative power supply module
until the mains supply is switched off.
 In general, the parameter transfer is not time-critical.
 Parameter data are, for instance, operating parameters, diagnostic information and
motor data.