Communication extension card
EtherCAT communication card
-85-
State
Description
Safe-Op
SDO communication is available.
Communication of receiving PDOs is available, but that of sending
PDOs is unavailable, in the Safe state.
Safe-Op to Op
The master station requests the jump to the Op state.
Op
Both SDO and PDO communication are available.
6.4.4 PDO mapping
The process data of an EtherCAT slave station is composed of SM channel objects. Each SM
channel object describes the consistent area of the EtherCAT process data and includes
multiple PDOs. An EtherCAT slave station with the application control function shall support
PDO mapping and reading of SM PDO assigned objects.
The master station can select objects from the object dictionary to perform PDO mapping.
PDO mapping configuration is located in the range of 1600h~1603h (RxPDOs: receiving
PDOs) and range of 1A00h–1A03h (TxPDOs: sending PDOs) in the object dictionary. The
PDO mapping method is shown in the following figure.
Object dictionary
Index
Sub-
index
1A00h
1A00h
1A00h
1A00h
3
2
1
0
Object content
0x60640020
0x60B90010
0x60410010
0x03
Index
Sub-
index
6040h
6041h
6042h
6060h
0
0
0
0
Object content
Object C
Object D
Object B
Object A
Bits
10h
8h
10h
10h
6064h
60D8h
60B9
0
0
0
Object F
Object G
Object E
10h
10h
20h
6064 indicates index
00h indicates sub-index
20h indicates parameter bit length
1A00h(PDO-1)
Object
B
Object
E
Object
G
Figure 6-5 PDO mapping method
In addition to PDO mapping, EtherCAT process data switching needs to assign PDOs to SM
channels. The relationship between PDOs and SM channels is established through SM PDO
assigned objects (1C12h and 1C13h). The mapping between SM channels and PDOs is
shown in the following figure.
Содержание Goodrive350 Series
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