Fuling DZB312 Series VFDs

Overview

Variable frequency drives specialized for CNC router spindles. The drives are made by Fuling Electric, aka Folinn Electric.

In the DZB312 series manual:

Here are the ones relevant for Modbus control:

Function Code	Serial No.	Default Value	Required Value	Description
F0.01	1	1: terminal	2: RS-485	run command source
F0.03	3	1: AVI	6: RS-485	frequency command source
F3.03	81	0: only keypad	2: keypad and RS-485	stop function sources
F4.11	108	0	?	fault automatic reset number
F4.18	115	0: keypad (F4.19)	3: RS-485	PID setpoint source
F4.20	117	0: reserved	3: RS-485	PID feedback source
F6.00	142	1		RS-485 Modbus slave address
F6.01	143	3: 9,600 bps		RS-485 Modbus baudrate
F6.02	144	0: N, 8, 1		RS-485 Modbus parity/data-width/stop-bits
F6.03	145	5		RS-485 Modbus response delay (ms)
F6.04	146	0.0 (invalid)	2.0 (2 seconds)	RS-485 Modbus timeout (s)
F6.05	147	1: continue without alarm	2: stop with alarm (only when in RS-485 mode)	RS-485 Modbus error handling
F6.06	148	0: respond to writes	0: respond to writes	RS-485 Modbus write response

In the DZB300 series manual (which also applies to DZB312 series):

Page 49 (91 in the PDF) describes the Modbus protocol (should be standards compliant)
Page 53 (100 in the PDF) has the register address map

Register No. (hex)	Register No. (dec)	R/W	Value	Description
0x1000	4096	R/W	1-8 (look in manual)	Modbus controlled command
0x1001	4097	R	1-4	inverter state
0x2000	8192	R/W ?	???	frequency/PID setpoint percentage (?)
0x3000	12288	R?		frequency setpoint?
0x3001	12289	R	(decimal Hz * 10)	output frequency
0x3002	12290	R		output current
0x3003	12291	R	(decimal V)	output voltage
0x3004	12292	R	???	output speed?
0x3005	12293	R	???	output power?
0x3006	12294	R		output torque?
0x3007	12295	R	(decimal V * 10)	DC bus voltage
0x5000	20480	R?	???	inverter fault address?
0x5001	20481	R	0-8 (look in manual)	Modbus communication fault