Hitachi SJ Series P1 VFDs

Overview

Variable frequency drive (VFD) series made by Hitachi. Useful for powering spindles of CNC routers.

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

Hitachi SJ Series P1 User's Guide

Hitachi Variable Frequency Drives SJ Series P1 Catalog