14-2
Chapter 14
RS485 Communication
14.2 Modbus-RTU
14.2.1
Communication specification
• Modbus-RTU is used as communication method.
14.2.2
Wiring and Connection
Wiring location
Connect communication lines to the control circuit
terminal block.
Item
Modbus-RTU Mode
Remarks
Transmission speed
2400/4800/9600/19.2k/38.4k/57.6k/76.8k/115.2k bps
Sets using a parameter.
Communication method Half duplex communication method
Synchronous mode
Non-synchronous mode
Transmission code
Binary
Transmission method
Transmission from a low-order bit
Applicable interface
RS-485
Data bit length
8 bits
Parity
No / Even / Odd
Sets using a parameter.
Stop bit length
1/2 bits
Sets using a parameter.
Start mode
Half side start mode by host side command
Waiting time
0~1000[ms]
Sets using a parameter.
Connection form
1:N (N=Maximum 32)
Sets using a parameter.
Error check
Overrun / Framing / CRC-16 / Horizontal parity
Abbreviated
Terminal Name
Description
SP
Sending/rec side
SN
Sending/receiving - side
RP
Enable termination resistor
terminal
(SN)
Enable termination resistor
terminal
(CM1)
Signal ground
FM CM1
Digital output
RP
SN
SP
SN
SP
ED+
ED-
RS485 communication
Terminal for safety
monitoring
Control circuit terminal area
Summary of Contents for SJ Series
Page 39: ...5 4 Chapter 5 Included Items Memo ...
Page 55: ...6 16 Chapter 6 Installation Memo ...
Page 91: ...7 36 Chapter 7 Wire Connection and Optional Devices Memo ...
Page 135: ...9 40 Chapter 9 Operating Instructions Memo ...
Page 145: ...10 10 Chapter 10 Test Run Memo ...
Page 159: ...12 2 6 Chapter 12 Inverter Functions Memo ...
Page 169: ...12 3 10 Chapter 12 Inverter Functions Memo ...
Page 195: ...12 5 8 Chapter 12 Inverter Functions Memo ...
Page 217: ...12 8 12 Chapter 12 Inverter Function Memo ...
Page 287: ...12 10 32 Chapter 12 Inverter Functions Memo ...
Page 303: ...12 11 16 Chapter 12 Inverter Functions Memo ...
Page 349: ...12 15 8 Chapter 12 Inverter Function Memo ...
Page 395: ...12 17 34 Chapter 12 Inverter Functions Memo ...
Page 397: ...12 18 2 Chapter 12 Inverter Functions Memo ...
Page 415: ...12 19 18 Chapter 12 Inverter Function Memo ...
Page 581: ...15 10 Chapter 15 Optional Cassettes Memo ...
Page 591: ...16 10 Chapter 16 ProDriveNext EzSQ Memo ...
Page 642: ...18 49 Chapter 18 Tips FAQ Troubleshooting Memo ...
Page 650: ...19 8 Chapter 19 Maintenance and Inspection Memo ...
Page 781: ...Appendix 1 70 Appendix 1 List of Parameters Memo ...