linuxcnc-modbus/helper.md

HOLDING REGISTER

R/W	Address hex (0-based)	Address dec (1-based)	Specification
W	0200H	513	Main control bit，BIT0-BIT7 mapping parameter address 0048H～004FH，BIT8 virtual input terminal enable
W	0201H	514	Given frequency，given frequency address when F002=2
W	0202H	515	Virtual input terminal1，BIT0-BIT15 corresponding digital input terminal function 01-16. Digital input terminal function 1-8 already exists in the main control bit, the modification here is invalid.
W	0203H	516	Virtual input terminal 2, BIT0-BIT15 corresponding digital input terminal function 17-32
W	0204H	517	EDO，Communication control digital output terminal, BIT3 corresponding (FA, FB, FC) relay terminal
W	0205H	518	EAO，Communication control analog output terminal AO
W	0206H～020FH	519~528	Reserved
R	0210H	529	Main control bit，BIT0～BIT15 mapping parameter address 0000H～000FH
R	0211H	530	Digital terminal status，BIT0-BIT5 corresponding X1-X6 , BIT11 corresponding (FA, FB, FC) relay
R	0212H	531	Virtual Output State 1, BIT0-BIT15 corresponding to Digital Output Terminal Function 01～16.
R	0213H	532	Virtual output state 2, BIT0-BIT15 corresponds to digital output terminal function 17-32.
R	0214H-021FH	533~544	Reserved
R	0220H～022DH	545~558	Mapping input registers (addresses 0000H-000DH)
R	022EH	559	AI1. Analog input value 1（0～100.00%）
R	022FH	560	AI2. Analog input value 2（0～100.00%）
R	0230H	561	PFI. Pulse input value
R	0231H～023FH	562~576	Reserved

WRITE Main control bit，BIT0-BIT7 mapping parameter address 0048H～004FH (0200H)

bit	value	operation	description
0000 0001	1	Operation	0000—Invalid FF00 (or 100， bit8 set 1)-Valid
0000 0010	2	Forward	0000—Invalid FF00-Valid
0000 0100	4	Reverse	0000—Invalid FF00-Valid
0000 1000	8	Stop	0000—Invalid FF00-Valid
0001 0000	16	Forward/reverse switch	0000—Invalid FF00-Valid
0010 0000	32	JOG	0000—Invalid FF00-Valid
0100 0000	64	JOG Forward	0000—Invalid FF00-Valid
1000 0000	128	JOG Reverse	0000—Invalid FF00-Valid

READ Mapping input registers (addresses 0000H-000DH)

Address hex (0-based)	Address dec (1-based)	Name
0220H	545	Output frequency
0221H	546	Set frequency
0222H	547	Output current
0223H	548	Output speed
0224H	549	DC voltage
0225H	550	AC voltage
0226H	551	temperature
0227H	552	Counter
0228H	553	PID target value
0229H	554	PID feedback value
022AH	555	Current fault
022BH	556	Total operating hours
022CH	557	Output power
022DH	558	X terminal state