CTI 2572-A, Installation And Operation Manual

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CTI 2572-A Installation and Operation Guide
68
Symptom Probable Cause Corrective Action
times. analyze the Ethernet traffic and
error statistics. Use a Network
analysis tool to capture network
traffic.
If you observe a problem you must
correct the source of the
interference.
A network station is transmitting an
excessive number of broadcasts.
Broadcast packets consume processor
resources of every station on the
network. Use the module diagnostic facility
to capture the count of broadcast
traffic. Use a network analysis tool
to analyze the broadcast traffic on
the network. If a problem is found
you must remove the offending
station from the local network.
8.6. Serial Communications Problems
The most common sources of signal problems are bad cables or an improperly configured PC serial
port. The R
CV
and X
MT
indicators can be a valuable aid in troubleshooting these errors. See the table
below.
SYMPTOM PROBABLE CAUSE CORRECTIVE ACTION
RCV Indicator does not
flash when attempting to
send data from a device
attached to the serial port. No signal is being received by the 2572.
This is probably due to a defective
cable, although it could be due to a faulty
PC port or configuration. Check the communications cable
wiring. Replace with a known good
cable and retry. If failure still occurs,
check your PC.
The RCV Indicator flashes
but the 2572-A XMT does
not flash. No signal is being transmitted by the
2572-A on this serial port. This is
typically mismatch in the serial port
parameters. Ensure the baud rate for the PC and
module are the same. Also , ensure
the PC serial port is configured for
Data Bits = 7
Parity = Odd
Stop Bits = 1
The RCV Indicator flashes
AND the 2572-A XMT
light flashes, but no signal
is received by the PC. This is probably due to a defective cable.
It may be a defective PC Replace cable with one known to be
good.
Try an alternate PC.