ARINC 429 Data Bus Word 350 Diagnostic Code Definitions Table

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ARINC 429 DATA BUS WORD 350 DIAGNOSTIC CODE DEFINITIONS TABLE

ARINC 429 DATA BUS WORD 350 DIAGNOSTIC CODE DEFINITIONS TABLE
CODE	HEX	DESCRIPTION	TROUBLESHOOTING PROCEDURES
		No fault found	No troubleshooting required, test passed.
01-19	01-13	Reserved	These diagnostic codes are reserved as spares for future use.
20	14	ARINC-429 bus loopback mismatch	Indicates an ARINC 429 monitoring diagnostic. Data output does not match a received sample. Indicates a problem with the Field Programmable Gate Array (FPGA) on the digital circuit car
21	15	ARINC-429 receiver no data	Indicates a problem with the FPGA on the digital circuit card.
22	16	ARINC-429 receiver parity error
23	17	ARINC-429 transmitter not ready
24	18	Altitude counter altitude data not ready	Indicates a problem with the digital circuit card.
25	19	Altitude counter beat frequency hardware overflow
26	1A	Altitude counter frequency range
27	1B	Altitude counter interval error
28	1C	Altitude counter missing pulse limit
29	1D	Analog output buffer 1 too high	Indicates a problem with the analog outputs (-1XX and -3XX units only).
30	1E	Analog output buffer 1 too low
31	1F	Analog output buffer 2 too high
32	20	Analog output buffer 2 too low
33	21	Transmitter antenna disconnected	Antenna monitoring must be enabled by connecting P1-21 to ground. Check antenna, antenna cable, and antenna connections. Used with ANT-52 antenna only.
34	22	Receiver antenna disconnected
35	23	Receiver and transmitter antennas disconnected
36	24	EEPROM no acknowledge data	Indicates that the EEPROM is not properly following the data transfer protocol.
37	25	EEPROM no acknowledge slave address
38	26	EEPROM no acknowledge word address
39	27	Modulator deviation control limit	Indicates that the modulator is not working properly.
40	28	Modulator center control limit
41	29	Modulator period error
42	2A	Modulator linearity error
43	2B	Modulator clock stopped
44	2C	Modulator slope error
45	2D	Modulator pulse width error
46	2E	Modulator center error
47	2F	Modulator monitor clear error
48	30	Modulator pulse missing error
49	31	State machine sequence error	Indicates that the internal state machine is not working properly.
50	32	State machine interval error
51	33	State machine results error
52	34	State machine initial error
53	35	NVM header record checksum error	These codes indicate the EEPROM contains corrupted data.
54	36	NVM maintenance record checksum error
55	37	NVM power cycle record checksum error
56	38	NVM trips checksum error
57	39	NVM trips backup checksum error
58	3A	NVM calibration checksum error
59	3B	NVM calibration backup checksum error
60	3C	NVM reserved checksum error
61	3D	NVM fault record checksum error
62	3E	Soft reset watchdog armed
63	3F	Strap AID complement	Indicates a FPGA problem on the digital circuit card.
64	40	Strap AID select invalid	Indicates the AID strapping and parity are not correct. There must be an odd number of ground straps connected to P1-22, P1-24, P1-27, and P1-37 on the ALT-4000.
65	41	Strap analog format select invalid	Indicates that the Analog Format Select A and B straps are both either open or grounded on -1XX and -3XX units. (N/A for -12X units.)
66	42	Strap modulation frequency complement	Indicates a FGPA problem on the digital circuit card.
67	43	Strap modulation frequency select invalid	Indicates that more than one ground strap is connected to P1-38, P1-40, or P1-47; or that none of the three pins are grounded. Only one pin may be grounded to select the modulation frequency.
68	44	Voltages -15/+12 high	Indicates a power supply problem.
69	45	Voltages -15/+12 low
70	46	Voltages -5/+12 high
71	47	Voltages -5/+12 low
72	48	Voltages +22 high
73	49	Voltages +22 low
74	4A	Voltages +30 high
75	4B	Voltages +30 low
76	4C	Voltages half full scale low
77	4D	Voltages half full scale high
78	4E	Voltages ground high
79	4F	Voltages full scale low