Filter
Top Products
CTI 2572 Installation and Operation Guide
86
Symptom Probable Cause Corrective Action
The COLLISION LED flashes
frequently and throughput is
degraded.
The network is experiencing
excessive traffic.
If the situation persists, isolate
this segment of the network by
installing a router or bridge.
The COLLISION LED flashes
frequently when using
10Base2 cabling
The coax cable is not terminated
properly or the transceiver is
defective.
Correct cabling and/or
transceiver problems.
The POLARITY LED is lit. This indicates that the cable is mis-
wired.
Although the 2572 will correct
for the problem, you should still
repair or replace the cable.
When use a PC program to
“Ping” the module, the
Ethernet RCV LED lights but
you get no response.
You have incorrectly set the IP
address of the module or have
entered the wrong address in the
ping command.
Make sure that the IP address
is set (module ACTIVE LED is
not blinking)
Ensure that the network portion
of the IP address used in the
module matches the network
portion of the IP address of the
PC.
Same as above, except the
RCV LED does not light.
The PC software is not operating
properly or there is no network route
to the module.
Try to “Ping” other TCP/IP
nodes. If unsuccessful, correct
software or routing.
The module responds to a
“Ping”, but when you try to
access PLC data, you get no
response.
The module is not logged in properly
to the PLC.
Use the PLC programming
software I/O configuration
function to properly log in the
module.
Throughput appears to be
degraded.
The module is not getting enough
access to the PLC.
Ensure that the number of task
codes per scan is set as high as
possible (preferably eight).
Ensure the module is installed
in a local base and that the
module is installed in the first
slot in the rack. Throughput will
be degraded in a remote base.
The requested data is highly
fragmented in the PLC, requiring
many random access transactions.
Copy fragmented data to/from
contiguous V memory. This
allows efficient block reads and
writes.
You have many clients accessing a
single 2572 causing an excessive
transaction load.
Reduce the client poll rate or
amount of data requested. Split
the load among multiple 2572’s.
You are making heavy use of the
Client function in combination with
the Server function.
Don’t trigger the Client
command more often than
required. Split the load among
multiple 2572’s