I am using the MTLT335D IMU by ACEINNA. I have it positioned on my desktop. It is powered externally. I am successfully communicating over RS232 (NAV-VIEW) and CAN.

When I request Acceleration Sensor (PGN 61485, 0xF02D), the 7 byte is 0x80. This is "Lateral Acceleration FOM=Error".

cansend can5 18EAFFC8#2DF000
(2023-10-10 09:01:50.275485)  can5  TX - -  18EAFFC8   [3]  2D F0 00
(2023-10-10 09:01:50.280401)  can5  RX - -  08F02D80   [8]  9A 7C B7 7C CC 80 80 06

When I request Angular Rate (PGN 61482, 0xF02A), the 7 byte is 0x40. This is "Yaw Rate FOM (Extended Range)=Degraded".

cansend can5 18EAFFC8#2AF000
(2023-10-10 09:02:29.194594)  can5  TX - -  18EAFFC8   [3]  2A F0 00
(2023-10-10 09:02:29.196262)  can5  RX - -  0CF02A80   [8]  FD 7C FE 7C 0B 7D 40 06

Per Table 79 and Table 72:

There does not appear to be anything set in the Master BIT (below)

Get Master BIT:

cansend can5 18EAFFC8#54FF00
(2023-10-10 09:05:02.374915)  can5  TX - -  18EAFFC8   [3]  54 FF 00
(2023-10-10 09:05:02.378613)  can5  RX - -  18FF5480   [8]  00 00 78 56 AA AA AA AA

The Software BIT is interesting. Per MTLT335D Series User's Manual, Table 19, bit 28 "Transmit queue overflow Error" is present.

Get Software BIT:

cansend can5 18EAFFC8#53FF00
(2023-10-10 09:05:40.474225)  can5  TX - -  18EAFFC8   [3]  53 FF 00
(2023-10-10 09:05:40.479845)  can5  RX - -  18FF5380   [8]  00 00 00 08 AA AA AA AA

There does not appear to be anything set in the Hardware BIT:

Get Hardware BIT:

cansend can5 18EAFFC8#52FF00
(2023-10-10 09:06:14.441768)  can5  TX - -  18EAFFC8   [3]  52 FF 00
(2023-10-10 09:06:14.446138)  can5  RX - -  18FF5280   [8]  00 00 AA AA AA AA AA AA

For reference, Get Unit Behavior:

cansend can5 18EAFFC8#59FF00
(2023-10-10 09:06:48.318967)  can5  TX - -  18EAFFC8   [3]  59 FF 00
(2023-10-10 09:06:48.322905)  can5  RX - -  18FF5980   [8]  C8 DE 84 AA AA AA AA AA

Also per Table 79 and Table 72, cycling power on the device does not clear Acceleration Sensor, Angular Rate byte 7 status. Each time I apply power it is the same result (0x80 and 0x40).

I have the following questions:

• What is causing Acceleration Sensor byte 7 and Angular Rate byte 7 to get set?
• What causes a SW BIT "Transmit queue overflow Error" to happen?
• I have "7430-3003-06 User Manual MTLT335D.pdf" dated "Aug 9, 2023 -06 06.05". Is this the latest version?
• Per NAV-VIEW 3.5.12, I have firmware 5020-3327-01 06.03. Is this the latest version?
• Per NAV-VIEW 3.5.12, "Sensor Status Enable Fields, Sensor Over Range" appears to be set. What causes this to happen?

NAV-VIEW Capture:

Read Unit Configuration shows "Sensor Over Range" set.

Your help in this matter is greatly appreciated.

Kind regards,
Jason Majchrzak