Chapter 6
Using Your Serial Device Server
©
National Instruments Corporation
6-7
ENET-232 and ENET-485 Series User Manual
Caution
Do
not
power-off the serial device server or disconnect the power supply while
running the NI Ethernet Device Firmware Update utility. Doing so will damage the unit.
6.
Click
Exit
to close the NI Ethernet Device Firmware Update utility.
Linux
x
86/Solaris 2.
x
1.
The firmware update utility is in the
NIserial/enet
subdirectory of
your installation. Run it with the following command syntax:
FirmwareUpdate <EEPROM file> <host>
where
<EEPROM file>
is the binary file containing the new firmware
image, and
<host>
is either a valid hostname or the dotted decimal
numerical IP address of the device to update.
2.
Follow any onscreen prompts.
Caution
Do
not
power-off the serial device server or disconnect the power supply while
running the firmware update utility. Doing so will damage the unit.
Configuring Transceiver Modes on the ENET-485
Note
Transceiver modes apply only to the ENET-485 Series serial device server. This
information is intended for advanced users.
The ENET-485 supports four modes of hardware transceiver control. You
can use hardware flow control to enable and disable your transmitters and
receivers so that they function on different bus topologies. Table 6-1 lists
the status of the transmitters and receivers under each of the transceiver
control modes.
Table 6-1.
Transceiver Control Modes
Mode
Transmitter
Receiver
Four-wire mode
Always enabled
Always enabled
Two-wire mode:
DTR with echo
Enabled with
DTR asserted
Always enabled
Two-wire mode:
DTR controlled
Enabled with
DTR asserted
Enabled with
DTR unasserted
Two-wire mode:
Auto Control
Enabled when
transmitting data
Enabled when not
transmitting data
