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CANopen Communication
FC5101 and FC5102
54
Version: 2.0
Client -> Server, Upload Response
11 bit identifier
8 byte user data
0x580 (=1408dec) + node
ID
0x4x
Index0
Index1
SubIdx
Data0
Data1
Data2
Data3
Parameter
Explanation
Index0
Index low byte (Unsigned16, LSB)
Index1
Index high byte (Unsigned16, MSB)
SubIdx
Sub-index (Unsigned8)
Data0
Data low low byte (LLSB)
Data3
Data high high byte (MMSB)
Parameters whose data type is Unsigned8 are transmitted in byte D0, parameters whose type is Unsigned16
use D0 and D1.
The number of valid data bytes is coded as follows in the first CAN data byte (0x4x):
Number of parameter bytes
1
2
3
4
First CAN data byte
0x4F
0x4B
0x47
0x43
Client -> Server, Download Request
11 bit identifier
8 byte user data
0x600 (=1536dec) + node
ID
0x22
Index0
Index1
SubIdx
Data0
Data1
Data2
Data3
Parameter
Explanation
Index0
Index low byte (Unsigned16, LSB)
Index1
Index high byte (Unsigned16, MSB)
SubIdx
Sub-index (Unsigned8)
Data0
Data low low byte (LLSB)
Data3
Data high high byte (MMSB)
It is optionally possible to give the number of valid parameter data bytes in the first CAN data byte
Number of parameter bytes
1
2
3
4
First CAN data byte
0x2F
0x2B
0x27
0x23
This is, however, not generally necessary, since only the less significant data bytes up to the length of the
object directory entry that is to be written are evaluated. A download of data up to 4 bytes in length can
therefore always be achieved in BECKHOFF bus nodes with 22 h in the first CAN data byte.
Client -> Server, Download Response
11 bit identifier
8 byte user data
0x580 (=1408dec) + node
ID
0x60
Index0
Index1
SubIdx
0x00
0x00
0x00
0x00
Parameter
Explanation
Index0
Index low byte (Unsigned16, LSB)
Index1
Index high byte (Unsigned16, MSB)
SubIdx
Sub-index (Unsigned8)
Breakdown of Parameter Communication
Parameter communication is interrupted if it is faulty. The client or server send an SDO telegram with the
following structure for this purpose:
Содержание FC5101
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