LRS400S Data Transceiver Users Manual
LUM0025AA Rev A
Version 1.0
14
Both Ports The terminal may be connected to either port.
Setup mode is invoked by sending a "U" (capital) to the Diagnostics port or by
pressing/toggling the Set-up button/switch, if available. OEM boards may also
enter Setup when Pin 2 is grounded.
The Main Data Port is the RS232 port. The OEM modules use a 2-row, 2 mm
female connector. The diagnostic cable for this port (ASC2009DC) is available from
FreeWave.
TurnOn/OffDelay
TurnOnDelay
- Sets the delay between when the line drivers are turned on and
when the data leaves the data port. This setting can be adjusted for a 1-9 mS
delay.
TurnOffDelay-
This setting specifies the time after the end of transmission of a
character to the RS485 bus that the transceiver stops driving the bus and releases
the bus to other devices. The units are ¼ of a character with a range of 0-9. An
entry of 4 means a delay equivalent to the duration of a full character. Default is
zero delay.
For data rates of 1200 bits/S or slower, avoid setting the TurnoffDelay parameter
higher than 4. At those rates the functionality of the microprocessor changes so
that a TurnoffDelay of 5 will have the same effect as if set to 1, and a setting of 6
will have the same effect as 2, and so on.
Note:
TurnOffDelay must be set to a value of at least 4 for RS4xx operation.
FlowControl
This menu specifies the hardware flow control for the Data port. The options for 0-3
are described below.
Port Additional Information
None Default - Uses software control (XON XOFF)
RTS
DTR
DOT
