TECO S310+ Series - Appendix

App2
Appendix 2: S310+ MODBUS Communication protocol
1. Communication Data Frame
S310++ series inverter can be Communication controlled by the PC or other controller with the
Communication protocol, Modbus ASCII Mode & Mode RTU, RS485 or RS232.
Frame length maximum 80 bytes.
1.1Hardware installation
controller
(PLC / HMI or
PC )
Slave S310+
Station 01
Slave S310+
Station 02
Slave S310+
Station 03
Slave S310+
Station FE
Option Card Option Card Option Card Option Card
RS-485
Interface
RSA RSB RSA RSB RSA RSB RSA RSB
Response
Request
**The network is terminated at each end with an external terminating resistor (120Ω，1/4w)**
1.2Data format frame
1.2.1 FOR ASCII MODE
STX(3AH) Start bit = 3AH
Address Hi
Communication Address(Station):
2-digit ASCII Code
Address Lo
Function Hi
Function Code (command):
2-digit ASCII Code
Function Lo
Command Start
Address
command Start byte:
4-digit ASCII Code
Command Start
Address
Command Start
Address
Command Start
Address
Data length
The length of the command:
4-digit ASCII Code
Data length
Data length
Data length
LRC Check Hi
LRC Check Code:
2-digit ASCII Code
LRC Check Lo
END Hi
End Byte :
END Hi=CR(0DH),END Li = LF(0AH)
END Lo
120Ω
1/4w
120Ω
1/4w