Home > Support > Knowledge Base
Knowledge Base
 
Reset Search
Search
 

 

Knowledge

Parity settings on module

« Go Back

Information

 
Problem Resolution
Data formats supported by Digi radio modems are as follows:
 
 
By data format we are referring to the number of data bits(B), type of parity(P): Even, Odd, Mark, Space or None (E, O, M, S or N) and number of stop bits(S). This is often represented in using the short hand style D-P-S (Data bits-Parity-Stop bits). E.g. 8-N-1 means 8 data bits, None parity and 1 stop bit.

All Digi radio modems transfer 8 bits over the air by default. This operating mode supports a number of data formats that require a total of 8 bits, such as 7 data bits, Even parity & 1 stop bit (7-E-1), or 7-O-1, 7-M-1, 7-S-1 and 8-N-1.

Also, all Digi radio modems can generate parity bits on the receiver as they shift the data out of the UART (serial port). This allows support for additional formats 8-E-1, 8-O-1, 8-M-1 and 8-S-1. The setting of 8-M-1 is equivalent to a setting of 8-N-2 if two stop bits are required.
 
 
Additionally, the XStream radio modems have the ability to actually transfer 9 bits over the air which is required for some multi-drop systems that use the parity bits to differentiate between address and data bytes.

Use the NB parameter to configure the parity and nine-bit settings of the XStream modems. Visit Parity and 9-bit options on XStream for more information on setting the NB parameter.
 

Contact Digi support with any additional questions.

Feedback

 

Was this article helpful?


   

Feedback

Please tell us how we can make this article more useful.

Characters Remaining: 255