Delta CT2000 Series, Руководство пользователя, Страница: 583 / 634

Chapter 16 PLC Function
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CT2000 Series
16-142
16-10 Internal communications main node control
The protocol has been developed in order to facilitate the use of 485 instead of CANopen in certain
application situations. The 485 protocol offers similar real-time characteristics as CANopen; this
protocol can only be used on the C2000 and CT2000 devices. The maximum number of slave
devices is 8.
Internal communications have a master-slave structure. The initiation method is very simple:
Slave device:
Set parameter 09-31 = -1 to -8 in order to access 8 nodes, and set parameter 00-20 = 1 to define the
control source as 485 and access the reference sources that must be controlled, namely speed
command (00-21 = 2), torque command (11-33 = 1), and position command (11-40=2). This will
complete slave device settings. (PLC functions do not need to be activated)
System
Setting the master is even simpler; it is only necessary to set parameter 09-31 = -10, and enable the
PLC.
Hardware wiring: The master and slave stations are connected via the 485 serial port. The CT2000
provide two types of 485 serial port interfaces, see the figure below: (please refer to 06 Control
terminals concerning detailed terminal connections)
S G- SG+
Removable Terminal Block
8 1 8 1
Modbus RS-485
Pi n 1~2, 7~8:
Pi n 3, 6: SGN D
Pi n 4:SG-
Pi n 5:SG+
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