TECO A510s - Modbus Protocol Descriptions; Communication Connection and Data Frame

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4.6 Modbus Protocol Descriptions
4.6.1 Communication Connection and Data Frame
The inverter can communicate with a PC or PLC via RS485 or RS232 using the Modbus RTU or Modbus ACSII
protocol. The maximum frame length is 80 bytes.
Network Connection
Controller
(PLC / HMI or
PC)
A510S
Node
Address 01
A510S
Node
Address 02
A510S
Node
Address 03
A510S
Node
Address FE
CN6 CN6 CN6 CN6
RS-485
Interface
S(+) S(-) S(+) S(-) S(+) S(-) S(+) S(-)
** Terminate the communications line with a (120 ohm, 1/4 watt) resistor at both ends.
CN6 Pin out
PIN Signal PIN Signal
1 RS-485 S+ signal 5 Tx signal
2 RS-485 S- signal 6 RS-485 S- signal
3 RS-485 S+ signal 7
VCC of isolated 5V
power supply
4 Rx signal 8
GND of isolated 5V
power supply
For RS-485 communication use pin 1 or pin 3 for S (+) and pin 2 or pin 6 for S (-)
87654321
120Ω
1/4w
120Ω
1/4w