Modbus Rtu; Communication Specifications - Leadshine CS2RS Series User Manual

4 Modbus RTU

4.1 Communication Specifications

Items
Specifications
Communication
RS485 and RS232
Port
Baud Rate 9600/19200/38400/115200[bps]
Synchronous
Start / Stop Synchronization
Mode
Communication
Half-duplex, Master-slave Mode
Mode
Starting bit:1bit
Character Data length:8bit
Composition Check bit:even/ odd/ no
Stop bit:0/1/2
Communicating
Modbus RTU
Protocol
0:broadcast
Slave ID
1-31:valid sub-devices Numbers
Function code
(FC)
0x01
0x03
Function code
0x05
(FC)
0x06
0x0F
0x10
Check Mode CRC-16
Message Length Variable, the max length is 200byte
Single message communication rate of RS485：(Unit: ms)
Start receiving to send
Baud rate
completion time
115200 2.44
38400 5.5
19200 10.76
9600 20.5
CS2RS Series RS485 Closed Loop Stepper Drive User Manual
Remarks
RS232 only for tuning
RS485 for motion control
Parameter setting
-
Slave/slave communication is prohibited
Parameter setting
ASCII is not supported
Parameter setting
Function
Read single or
multiple bit
Read single or
multiple data
Write value to
-
single bit
Write value to
single data
Write value to
multiple bit
Write value to
multiple data
Left is Low-bit, Right is high-bit
-
Receive wait
time
0.64
1.16
2.2
3.8
-15-
Time from transmission
completion to recovery of
receiving state
0.6
0.46
0.38
0.6
Total
3.08
7.12
13.34
24.9