mbus A429 Update Labels.vi
Description
The A429 Update Labels function updates data attached to multiple ARINC 429 labels in a periodic transmit. The ARINC 429 labels must have already been created and have its rate defined. Refer to mbus A429 Send Labels At Rates to first add ARINC 429 labels.
The SDI parameter is an optional advanced parameter. It can be kept unwired or wired to false for non-advanced needs.
When SDI is set to true, the scheduler treats outgoing messages using the same label but different Source-Destination Identifiers (SDI) as separate messages.
The SDI is the two Least Significant Bits of the data. It serves as a label extension and can help differentiate two identical units in the same environment.
When SDI is enabled, the pair label-SDI are the message ID and each label-SDI pair can have its own rate.
| Parameters | ||
|---|---|---|
| error in | in | error conditions that occur before entering the function |
| portHandle | in | reference to the configured port |
| labelCount | out | number of ARINC 429 words to update |
| labels | in | ARINC 429 labels to update |
| data | in | ARINC 429 new data to override |
| sdi | in | Advanced settings, refer to above description for details. Set to false by default |
| portHandle | out | reference to the configured port |
| error out | out | error information |
| function return | out | function execution status |
Handle parameters are available as input and output. Output is a copy of the input and may be used to daisy chain successive VIs and reduce wire density.
Availability
Available in Multibus VI 1.0 and later.
See Also
mbus A429 Send Labels At Rates.vi