Use Start Character (F1) setting


(see setting description format info here)

Function:Enables or disables the use of the start character 
Set (S) command format:SF1x, where x: 0 (disabled), 1 (enabled)
Get (G) command format:GF1
Init (I) command effect:Initialized unconditionally, through network command, serial command, or quick initialization
Post-initialization value:0 (disabled)
Change takes effect:After reboot or exiting the serial programming mode
Overriding parameter:---
Relevance conditions:Start On Any Character (SA) setting= 0 (disabled)
First introduced:Earlier than "baseline" V3.14/V3.51
See also:Serial-to-Ethernet data routing


This setting enables the use of specific character code as the start character that can open the serial data block. Start character code itself is defined by the Start Character Code (S1) setting . Serial data blocks are related to routing the data in the serial-to-Ethernet direction. See serial-to-Ethernet data routing for more information. 

Use Start Character is irrelevant when the Start on Any Character (SA) setting is 1 (enabled) because in this case the new serial data block is opened by any character and there is no need to set a specific start character.

Care should be taken not to disable Use Start Character and Start on Any Character (SA) setting at the same time. No data will ever be accepted into the serial port of the DS in this case!