Brushless Motor Driver
丨
BLD1500RA
ICAN 2021.03
8 Modbus communication
8.1Communication interface and wiring mode
The communication function of the driver
adopts Modbus protocol and conforms to the
national standard GB / T 19582.1-2008. The
two-wire serial link communication based on
RS485 is used. The physical interface adopts
RJ45. The terminal definition is shown in the
figure below. Three wires need to be connected:
B, A and GND (wiring is prohibited for other
terminals in this RJ45 interface). The
communication address is set through
communication. The 120 Ω terminal matches the
resistance and needs to be externally connected
by the user.
Communication conditions
Interface
RJ45
Bus
RS485
Agreement
MODBUS
Communication mode
half-duplex
Standard
GB/T 19582.1
—2008
Communication rate
9600
data bit
8 bit
Stop bit
1 bit
Check out
Modbus CRC(Little Endian)
communication node
32
