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IMU383ZA Series User's Manual
________________________________________________________________________
Table 31 Fault-Detection Fault-Causation Flags
Field Value
When a fault occurs, the master BIT (Section 8.2) will be set to indicate a Hardware Status error
(the sensor status BIT is also set but the sensor-status field does not indicate an error – this will be
implemented in the next code release). By reading the Test 0 message (Section 6.3.3) and parsing
the message, the hardware status (Table 33 in Section 8.3) indicates either an accelerometer or a
rate-sensor fault via bits 4 or 5 respectively. Once it has been determined that a Fault-Detection
error occurred, reading Fields 0x4C, 0x4D, and 0x4E will result in the failure mechanism and
sensor-chip that triggered the fault.
Fault-Detection Enable/Disable
Fields 0x61 to 0x62 enables or disables the Fault-Detection checks. Table 27 lists the checks
enabled and disabled at startup.
Commands to Program Configuration
7.7.1
Write Fields Command
Write Fields ('WF' = 0x5746)
Preamble
Packet Type
0x5555
0x5746
This command allows the user to write default power-up configuration fields to the EEPROM.
Writing the default configuration will not take effect until the unit is power cycled. NumFields is
the number of words to be written. The field0, field1, etc. are the field
IDs that will be written with the field0Data, field1Data, etc., respectively. The unit will not write
to calibration or algorithm fields. If at least one field is successfully written, the unit will respond
with a write fields response containing the field IDs of the successfully written fields. If any field
is unable to be written, the unit will respond with an error response. Note that both a write fields
and an error response may be received as a result of a write fields command. Attempts to write a
field with an invalid value is one way to generate an error response. A table of field IDs and valid
field values is available in Section 7.1.
WF Payload Contents
Byte Offset
Name
0
numFields
1
field0
3
field0Data
5
field1
7
field1Data
...
...
numFields*4 -3
field...
Doc# 7430-1398-01
Corresponding Fault
0x0
0x4
Accelerometer Consistency Fault
0x5
Rate-Sensor Consistency Fault
Length
Payload
1+numFields*4
<WF payload>
Format
Scaling
U1
-
U2
-
U2
-
U2
-
U2
-
U2
-
U2
-
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Oneyac.com
No fault
Units
Description
-
The number of fields to write
-
The first field ID to write
-
The first field ID's data to write
-
The second field ID to write
-
The second field ID's data
-
...
-
The last field ID to write
Termination
<CRC
(U2)>
Page 43
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