(see setting description format info here)
| Set (S) command format: | SMLlll, where lll is the number of new bytes in the 1-255 range | 
| Post-initialization value: | 255 (bytes) | 
| Relevance conditions: | Current Transport Protocol (TP) [setting/ parameter]= 0 (UDP)  | 
| First introduced: | Earlier than "baseline" V3.14/V3.51 | 
 Maximum Packet Length defines after how many new bytes recorded into the serial-to-Ethernet buffer a break condition will be generated. Break conditions are related to routing the data in the serial-to-Ethernet direction. See serial-to-Ethernet data routing for more information.
 Maximum Packet Length is irrelevant when  current Transport Protocol (TP) [setting / parameter ] is 1 (TCP) because in this mode the DS ignores the value of the  Maximum Packet Length setting and uses the run-time parameter of 127 bytes.