Communication extension card
EtherCAT communication card
-86-
Object dictionary
Index
Sub-
index
1C13h
1C13h
1C13h
2
1
0
Object content
0x1A01
0x1A00
0x02
Index
1A00h
1A01h
1A02h
1A03h
Object content
PDO_3
PDO_4
PDO_2
PDO_1
1C13h
PDO_1
PDO_2
Figure 6-6 SM PDO assignment
Default PDO mapping (Position, Velocity, Torque, Torque limit, Touch probe):
RxPDO
(0x1600)
Control
word
(0x6040
)
Target
Position
(0x607A)
Target
Velocity
(0x60FF)
Target
Torque
(0x6071)
Max.
Torque
(0x6072)
Mode of
Operation
(0x6060)
Profile
velocity
(0x6081)
Touch
Probe
Function
(0x60B8)
TxPDO
(0x1A00)
Statusw
ord
(0x6041
)
Position
Actual
Value
(0x6064)
Speed
Actual
Value
(0x606C)
Torque
Actual
Value
(0x6077)
Following
Error
Actual
Value
(0x60F4)
Mode of
Operation
Display
(0x6061)
Error Code
(0x603F)
Touch
Probe
Value
(0x60BA)
6.4.5 DC-based network synchronization
The DC (distributed clock) can enable all EtherCAT devices to use the same system time so
as to control the synchronous execution of all device tasks. In the EtherCAT network, the clock
with the DC function of the first slave station connected to the master station is used as the
reference clock across the network. The other slave stations and master station use this
reference clock for synchronization.
Free-Run: The running cycle and communication cycle of each servo drive are not related to
the communication cycle of the master station.
DC Mode: The servo drive performs synchronization through Sync0 of the master station.
6.5 CiA402 device protocol
The master station controls the drive through the control word (0x6040) and obtains the
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