Echelon NodeUtil Node Utility - Manual (Page 27)

NodeUtil User’s Guide 21
If the selected device is a router, additional information is displayed including
the router type. For a description of the meanings of these router-specific values,
see the
LonWorks Router User’s Guide .
You are given an opportunity to clear the status of the device, which clears the
error counters, the reset cause, and the last error logged. Clearing the status can
be useful before running the Performance test ([) command; see
[ – Performance
Test on page 23.
T – Transceiver Parameters
Use this command to display the transceiver (communications) parameters of the
selected device. The information displayed depends on the transceiver type. For
a description of these values, see the FT 3120 / FT 3150 Smart Transceiver Data
Book , the PL 3120 / PL 3150 / PL 3170 Power Line Smart Transceiver Data Book ,
or the Series 5000 Chip Data Book .
If the selected device is a network interface that supports changing the input
clock, you are prompted to change the input clock rate by selecting from a menu.
The choices are 5, 10, and 20 MHz. You then have an opportunity to change the
transceiver parameters by selecting from a menu. The choices depend on the
input clock rate.
For Series 5000 devices, you are prompted to change the system clock rate along
with the interface bit rate. The system clock can be set to 5, 10, 20, 40, or 80
MHz.
The NodeUtil Node Utility does not support changing the transceiver parameters
for devices with input clocks less than 5 MHz.
If the device implements transceiver ID (XID) pins, you typically cannot change
the interface bit rate or the transceiver type (differential, single-ended, or special-
purpose mode). To change types of devices, you must first physically set the
value read from the XID pins to 30 (decimal) or 1E (hexadecimal).
Selecting incorrect communications parameters could make it impossible to
communicate with the device over the network:
• If the device is based on an FT 3120, PL 3120, or PL 3170 Smart
Transceiver, it might not be recoverable.
• If it is based on an FT 3150 or PL 3150 Smart Transceiver, you might be
able to recover it with the (R)eboot command. If the device is not
recoverable with the reboot command, you can use the EEBLANK
program (available from the Echelon Web site) to blank the EEPROM
and reboot the default image.
• If it is based on an FT 5000 Smart Transceiver or Neuron 5000 Processor,
you might be able to recover it by clearing the external non-volatile
memory for the device. See the
Series 5000 Chip Data Book for a
description of how to clear the external non-volatile memory.
U – Update Input Network Variable
Use this command to update an input network variable on the selected device.
Enter the index of the network variable (use the (L)ist network variables
command or the (P)oll network variables command to determine the network