View source for 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 ===

{| class="wikitable"
! style="text-align:left;" | Name
! style="text-align:left;" | Value
! style="text-align:left;" | Default
! style="text-align:left;" | 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 ===

<pre># 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 </pre>

== Online Resources ==

[https://www.hitachi-ies.co.jp/english/products/inv/sjp1/index.htm Inverter : SJ series P1 : Hitachi Industrial Equipment Systems]

[https://www.wolfautomation.com/media/pdf/ac-drives/hitachi/p1/hitachi-sjp1-instructman.pdf Hitachi SJ Series P1 Basic Guide]

[http://www.aef-hitachi.cz/files/download/frekvencni-menice/sj-p1/manual-sjp1.pdf/ Hitachi SJ Series P1 User's Guide]

[https://www.hitachi-ies.co.jp/english/catalog_library/pdf/SM-E273Q.pdf Hitachi Variable Frequency Drives SJ Series P1 Catalog]