FIX UDP Communication Protocol (General)

Maintainer: JT　|　Last updated: 2026-03-09

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Introduction

UDP Ports

• FIX Server Port: 6924
• Client Server Port: 7000

UDP Format

Field	Length	Type	Description
Magic	8 bytes	string	"FIXFIXFI"
ACK	2 bytes	unsigned short	1, 2, 3, 4 …
Command	2 bytes	unsigned short
Parameter Length	4 bytes	int
Parameter	unlimited

Reserved ACKs

ACK	Description
6000	FIX counting value changed, sent back to the Client
5001	FIX returns the file name after saving a teach file

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Common Counting Commands

Command	Description	Parameter Format	Return	Notes
104	Load image and count	Image path[; 4ReelsMode]	Single reel: Image Name, Count Number, Red Points Number Multiple reels: Image Name, Count Number, Red Points Number, Count Number, Red Points Number, Count Number, Red Points Number, Count Number, Red Points Number	Result image saved as *-results.png You may pass the 4-reel mode explicitly, or let FIX auto-detect 4-reel mode in its settings
1002	Load image	Image path	None
6000	After the user changes the FIX count on the UI, it is sent back to the Client		Image Name, Count Number, Red Points Number	Currently only applies to single reel? To be confirmed

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Common Inspection Commands

Command	Description	Parameter Format	Return	Notes
101	Load image and run teach file	Image path;Teach file name	Error code
120	Switch teach file group	Group name	List of teach files in this group	If the group does not exist, create it If it exists, show only the teach files of the current group
121	Delete teach file group	Group name	Error code	Deletes the group and all teach files within it
1100	Create teach file	Teach file name → save current image to the currently selected group Teach file name;Group name → save current image to the group Teach file name;Group name;Image path → save the specified image to the group Teach file name;Group name;Image path;Calibration info → save the specified image to the group	Error code
1102	Edit teach file	Teach file name	Error code
1103	Delete teach file	Teach file name	Error code	Teach file name must be globally unique
1104	Get teach file list	None → get the full teach file list Group name → get the teach file list within the group	Teach file list	Separated by semicolons
1105	Get the name of the teach file being edited	None	Teach file name, or empty
1014	Load image with calibration info	Path;Float	None	If the float is 1.533, it means 1 pixel = 1.533 mm
1015	Set the calibration info of the current image	Float	None	If the float is 1.533, it means 1 pixel = 1.533 mm Calibration info is passed in millimeters; the UI can display it in various formats
5001	Set whether to return the teach file name each time after saving	0: default, do not return 1: return	None	Convenient for auto-matching positions and corresponding teach files during CNC teaching Needs to be enabled only once; saved in the registry KEY=sd_ReturnUDPCMD5001AfterSaving

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General Commands

Command	Description	Parameter Format	Return	Notes
1006	Window always on top	None	None
1007	Window not on top	None	None
1200	Show main window	None	None
1201	Hide main window	None	None
1202	Close FIX	None	None
1204	Show parameter panel	None	None
1205	Hide parameter panel	None	None
1211	Get main window handle	None	8 bytes
1212	Get parameter panel handle	None	8 bytes
1213	Set main window parent	Handle, x, y, w, h	None	Given a handle and view size, FIX sets itself as its child window and sets the size.
1214	Set parameter panel parent	Handle, x, y, w, h	None	Given a handle and view size, FIX sets itself as its child window and sets the size.
1301	Set FIX visibility (when not embedded)	0: hide 1: visible 2: query	0: hide 1: visible
1302	Set UDP response	0: default 1: respond to all commands 2: query	0: default 1: respond to all commands
1303	Set close-button behavior	0: perform close 1: hide FIX 2: query	0: perform close 1: hide FIX
2302	Set user mode	["Operator", "Engineer"]	Error code	Operator: operator mode (cannot modify templates) Engineer: supports all operations
2303	Show/hide all software markers	["Hide", "Show"]	Error code	Software version info Counting A-OK markers Tray icon Image info at the top of the software (mouse position, pixels, zoom, etc.)

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Error Codes

Error Code	Description
0	Success
1	Inspection result: GOOD
2	Inspection result: NG
4	Unknown error occurred; see the log file for details
8	Parameter format error
16	Image file does not exist
32	Teach file does not exist
64	Teach file execution failed
128	Screenshot exception
256	Image alignment error
512	Target object match error, or does not exist

* Error codes can be combined

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