Hitachi WJ C1 Series User Manual

Chapter 11 RS485 Communication
11-2-2
 When reading the status of 16 consecutive coils from coil number 0001h, the order of the data
is as follows. Data 1 is byte data transmitted first.
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
Data 1
0008h
0007h
0006h
0005h
0004h
0003h
0002h
0001h
Data 2
0010h
000Fh
000Eh
000Dh
000Ch
000Bh
000Ah
0009h
 If the read coil extends beyond the range of the defined coil number, coil data outside the range
is sent as "0".
 If the command cannot be executed successfully, an exceptional response is returned. For
details, refer to "11.2.9 Exceptional Responses".
 Reads coil numbers 0010h to 0058h can also be substituted by holding register reads register
number 1E01h to 1E05h. As an example, the bit-structure of the holding register 1E01h is
shown below. For details, refer to "18.1.1 List of Modbus Coil Numbers".
■ (Example) Bit-structure of holding register 1 E 01 h
(Holding register allocation status of coil number 0010h to 001Fh)
bit
Symbol
Item
bit
Symbol
Item
15
ONT
Accumulated power-on time
over
7
OD
Over deviation for PID control
14
RNT
Accumulated operation time
over
6
OL
Overload warning notice
13
TRQ
Torque limited
5
FA2
Set frequency overreached
12
UV
Undervoltage
4
FA1
Constant-frequancy reached
11
-
-
3
RUN
Running
10
OTQ
Over-torque/under-torque
2
-
-
9
FA3
Set frequency reached
1
IRDY
Inverter ready
8
AL
Alarm
0
Dir
Rotation direction (0: Forward/1:
Reverse)

Hitachi WJ C1 Series Specifications

General

Brand	Hitachi
Model	WJ C1 Series
Category	Inverter
Language	English