Lenze EPM−T9XX Modular system - Manual (Page 231)

Transmitting parameter data
Telegram structure
9
Network via CANopen
9.4
9.4.1
L
9.4−1 EDSPM−TXXX−9.0−11/2009
9.4 Transmitting parameter data
Parameter data are the so−called indices.
Parameters are usually set only once during commissioning.
Parameter data are transmitted as so−called SDOs (Service Data Objects) via the
system bus and acknowledged by the receiver, i.e. the transmitter gets a feedback
if the transmission was successful.
9.4.1 Telegram structure
Structure of the telegram for parameter data:
11 bit 8 bytes of user data
Identifier
Instruction
code
Index
Subindex Data 1 Data 2 Data 3 Data 4
Low byte High byte
l The subchapters below explain the individual telegram components in detail.
l The chapter 9.4.2 contains an example of how to write a parameter.
( ¶ 9.4−4)
l The chapter 9.4.3 contains an example of how to read a parameter. ( ¶ 9.4−5)
Identifier
Instruction
code
Index
Subindex Data 1 Data 2 Data 3 Data 4
Low byte High byte
One parameter channel is available for parameter data transmission, which is
addressed via the identifier.
Identifier = Basic identifier + node address of the device
dec hex
SDO Parameter channel 1
Output (transmit) 1408 580
+ value set with coding switch
Input (receive) 1536 600
Identifier