Rs485 Communication; Communication Sequence - Hyundai N700E Instruction Manual

N700E INSTRUCTION MANUAL

9. RS485 Communication

The communication between inverter and external controller is doing by RS485 using modular
connector in cling to inverter controller.
Function
code
b17
A01
A02
Interface
Communication method
Communication speed
Communication code
Data bits
Parity
Stop bit
Starting method
Wait time
Connection type
Error check
RS485
DOP

Communication sequence

The communication sequence is as follows
Frame start : Frame start is recognized by signal line data transmitted.
Frame completion : Frame completion is recognized by no data during correspond 4, 5-character time.
Frame 1: Transmit from external controller to inverter.
Frame 2: Indication reflects from inverter to external controller
Minimum Maximum
1 32
0 3
0 2
Item
Frame / CRC / CMD /
MAXREQ / parameter
RXP
Transmit/Receive
24V
+side
Initial
Unit
Value
1 - Setting the communication number
0 - 3 : Communication
0 - 2 : Digital operator
Description
RS485
Half duplex
9600
Binary code
8
No.
1
External request
10∼1000ms
1 : N (Max32)
RXN
Transmit/Receive
-side
9-1
Description
Remark
Fixing
Fixing
Fixing
Fixing
Inverter is only slave part.
Communication number is
selected at b17
CM1
24V GND