MX Foundation 4
FAQ

Protocol

MIL-STD-1553

Are illegal commands detected?

No, MX Foundation does not support detection of illegal commands.


What is respTime[0] and respTime[1] of a record?

respTime[0] is the RT response time. respTime[1] is the receive RT response time in a RT-RT transaction.


The BC is sending the same data twice instead of the updated data.

When updating messages, if two commands with the same buffer are close to each other (rate < 1 msec), it can happen that the firmware does not have time to update the buffer before the next command is sent, so the same data will be sent twice.

There is two ways to avoid this limitation :

1- BC Data Buffer Management. It is possible to specify which data buffer a command should use.

2- Aperiodic commands. Contrary to the minor frame, each command has its own buffer, so no update problem here. But, the host needs to continuously sends aperiodic commands to mimic the minor frame.

ARINC 429

How can a low speed (12.5kbps) receiver receive high speed (100kbps) data?

If the delay between messages is long enough to allow the decoder to finish decoding the message before the next one comes in, then no errors are reported by the low speed receiver channel and it will record the data correctly.

ARINC 629

Why does my equipment not receive my transmissions?

Verify if KMXF_A629_MODULE_RX_ONLY attribute is set to disabled.
On FlexMulti 629, verify if the key at the back of the device is at a position to allow transmission (LED will be orange).

Updated 10/23/2023