Modbus RS485 Stepper Drive User Manual
4.2.1 Read Holding Registers FC= 03
Read Holding Registers Query (Master to
Slave)
Read Holding Registers Response (Slave to Master)
Address of beginning
register to be read
Number of data bytes in
message
Total number of
registers to be read
Data from registers (2
bytes per register)
Example A: Read the value of a single register--peak current
Send message: 01 03 01 91 00 01 D3 1B
Receive message: 01 03 02 00 0A 38 43
Details as following:
Master->slave data:
Slave->master data:
Note: 0x0191-- output peak current, 000A(Hexadecimal)=10(decimal, unit: 0.1A), it means the current 1A.
Example B: Read multiple register values
Send message: 01 03 01 BC 00 06 05 D0
Receive message: 01 03 0C 00 00 00 02 00 00 00 01 00 00 00 04 B6 13
Details as following:
Master->slave data:
Slave>master data:
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