6 Configure the Operation Modes
+----------------------------+
|
rs232
|
|
rs422-4-wire
|
|
rs422-4-wire termination
|
|
rs485-4-wire
|
|
rs485-2-wire
|
|
rs485-4-wire-termination
|
|
rs485-2-wire-termination
|
+----------------------------+
Figure 73: Operation Mode by Software
These are the same modes as available by configuration of DIP Switches. Using software configu-
ration each port is functional independent from other ports. This is the only way to have different
operation modes on a multi-port NetCom
+
.
When the NetCom
+
is used via the Virtual Com Driver mode, the following serial parameters
are controlled by the application which opened the serial port. However certain installations use
a different operation without Driver mode. Then the serial parameters must be defined via this
configuration section.
The
Baudrate
may be selected in a drop-down list of common values, or entered manually. If
Manual
is selected in the list, the value in the respective field is used to transmit data. NetCom
+
checks if the configuration is possible, and warns otherwise. Note: The
Baud Base
is shown for
reference only, it is not necessarily an achievable bitrate.
DataBit
per character,
Parity
and
StopBit
are quite usual parameters. The
FlowType
is available as standard configuration. But
there is also the option of
Advanced
Configuration.
FlowType Configuration
Port Nr.
1
AutoCTS
off
AutoRTS
off
AutoDSR
off
AutoDTR
off
AutoTxXOnXOff
off
AutoRxXOnXOff
off
Figure 74: Advanced Flow Control
This gives very specific control to the user. NetCom
+
can generate Events on RTS, DTR or as
XON/XOFF, when the serial receive buffer is filled/emptied. These will inform the connected
device to stop or continue the transmission. The NetCom
+
will also respect the state of CTS, DSR
or XON/XOFF when sending data to the connected serial device.
The
RxTriggerLevel
defines when NetCom
+
sends the received data to the host. If the amount of
data is this high, the data is sent. It does not matter if there is still data coming on the serial line.
If less data is received, the NetCom
+
waits some time for further data, before sending the buffer.
When this parameter is reduced to ‘
1
’ obviously all data is sent right when it has been received.
September 2016
NetCom Plus User Manual
75
Summary of Contents for NetCom Plus 111
Page 133: ......
