Hitachi SJ Series P1 VFDs
Overview
Variable frequency drive (VFD) series made by Hitachi. Useful for powering spindles of CNC routers.
Factory reset
To perform a factory reset of the VFD, set the following parameters in this order:
- set Ub-01 to 04
- set Ub-02 to 02
- set Ub-05 to 01
- (wait for initialization to complete)
Modbus control
VFD parameters
| Name | Value | Default | Description |
|---|---|---|---|
| AA101 | 08: RS-485 | 01: Ai1 terminal | speed command source |
| AA111 | 03: RS-485 | 00: FW/RV terminals | operation command source |
| CF-01 | 05: 9600 baud | 05: 9600 baud | RS-485 baud |
| CF-02 | 1 | 1 | Modbus slave address |
| CF-03 | 00: no parity | 00: no parity | RS-485 parity |
| CF-04 | 1 | 1 | RS-485 stop bits |
| CF-05 | 04: deceleration stop | 02: ignore | RS-485 communication error handling |
| CF-06 | 2.00 seconds | 0.00 seconds | RS-485 communication timeout time |
| CF-07 | 2ms | 0ms | RS-485 communication waiting time |
| CF-08 | 01:Modbus-RTU | 01:Modbus-RTU | communication method |
Modbus coils/registers
TODO
mbpoll
# turn on output ./mbpoll /dev/ttyUSB0 1 -b 9600 -s 1 -P none -a 1 -r 1 -t 0 -B # turn off output ./mbpoll /dev/ttyUSB0 0 -b 9600 -s 1 -P none -a 1 -r 1 -t 0 -B # write 60Hz output frequency as Hz * 100 (2-place fixed point in decimal) ./mbpoll /dev/ttyUSB0 6000 -b 9600 -s 1 -P none -a 1 -r 10502 -t 4:int -B
Online Resources
Inverter : SJ series P1 : Hitachi Industrial Equipment Systems
Hitachi SJ Series P1 Basic Guide