HD1-E CANopen instruction manual
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7. Communication
7.1 Message structure
CAN2.0A message transmits data between the master station and bus nodes via data frame. The message structure is shown as
follows:
Communication object
Function code (binary)
COB-ID (hexadecimal)
NMT
0
0x00
SYNC
1
0x80
EMCY
1
0x81 ~ 0xFF
PDO1 Tx
11
0x181 ~ 0x1FF
PDO1 Rx
100
0x201 ~ 0x27F
PDO2 Tx
101
0x281 ~ 0x2FF
PDO2 Rx
110
0x301 ~ 0x37F
PDO3 Tx
111
0x381 ~ 0x3FF
PDO3 Rx
1000
0x401 ~ 0x47F
PDO4 Tx
1001
0x481 ~ 0x4FF
PDO4 Rx
1010
0x501 ~ 0x57F
SDO Tx
1011
0x581 ~ 0x5FF
SDO Rx
1100
0x601 ~ 0x67F
Node guarding
1110
0x701 ~ 0x77F
COB-ID is different with different communication addresses, but its range is definite at the same command.
Note: If the command does not refer to the remote frame, it will be the data frame.