Lantronix MSS4-D Installation Manual

Also see for MSS4-D: Installation guide

Contents

Lantronix MSS4-D Installation Manual Manual pdf 41 page image

Configuration Serial Port Configuration4-114.4.2.1 Saving Autostart CharactersIf the port is configured with a Dedicated port host and Autostart is enabled for that port,the autostart characters that start the connection can either be passed to the host as the firstbytes of data or can be discarded. If you want to pass the characters along, you mustconfigure the Autostart Save parameter, as the default is to discard autostart characters. Thefollowing example passes the first (or only) autostart character along to the host.Figure 4-19: Saving Autostart CharactersAnother option is Save None, the default setting, which will not pass anything on to thehost.4.4.3 Serial DataOnce a connection has been started, several different triggers can be used to transmit allaccumulated serial data to the host. These options are controlled with the ChangeDatasend command. The datasend process used by the MSS balances network traffic withlatency concerns.One kind of trigger can be set by specifying a “timeout” condition of either the time sincethe last character was received or the time since the current character burst was started. Forexample, to trigger data transmission 150 milliseconds after the current character burstbegan, enter the following command:Figure 4-20: Transmitting Serial Data with Trigger DelayThe example in Figure 4-20 can be visualized as:x x x xxx xx (data) x x xx xxxxxxxx xx xxxx xx xxxx|-----------------------------------------------------|150 milliseconds transmit packetAnother option is to set a one- or two-character trigger that will cause the MSS to transmitthe data. You can also specify whether the trigger characters will be sent to the host as partof the serial data or whether they should be discarded (the default). For example, thefollowing commands will cause the accumulated serial data to transmit as soon as the “Z”character is detected in the data stream and to send the matched character (“Z”) to the hostas part of that data.Figure 4-21: Transmitting Serial Data with a Character TriggerLocal>> CHANGE PORT 1 AUTOSTART SAVE 1Local>> CHANGE PORT 1 DATASEND DELAY FRAME 150Local>> CHANGE PORT 1 DATASEND CHARACTER ZLocal>> CHANGE PORT 1 DATASEND SAVE 1