AT commands
Digi TransPort User Guide 134
S15 Data Forwarding Timer
Units: 10ms
Default: 0
Range: 0-255
S15 is used to set the data forwarding timer for the ASY port in multiples of 10ms. The default
data forwarding time is 20ms and in normal use this there should be no need to change this.
However, setting S15 to 1 enables a special mode of operation in which data is forwarded as fast
as possible for the data rate for which the port is configured (at 115000bps, this will typically be 2-
3ms).
Note that the default value of 0 is equivalent to setting the register to 2 in order to maintain
compatibility with older systems.
S16 RS422/485 serial port settings
The RS485 option is only available on specific hardware versions.
Units: N/A
Default: 0
Range: 0,2,3, where 0=RS232, 2=RS485 full duplex, 3=RS485 half duplex
Following example shows how to setup and save ASY 0 in 485 half-duplex mode
AT\port=0
ATS16=3
AT&w
AT\port
The at\port=0 is needed to ensure that subsequent AT commands are directed to the right port
(ASY0). The port settings can be saved permanently using AT&W.
Issue the command ats16? and check that the value of this S register is 3. To set it back to RS232
then set ATS16 to zero and save it with the &w command.
S23 Parity
Units: N/A
Default: 0
Range: 0-2,5,6
The value stored in S23 determines whether the parity used for the ASY port is set to None (0),
Odd (1), Even (2), 8Data Odd (5) or 8Data Even (6).
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