Sterlco A3 Blender Control and Data Acquisition Software User Manual
Page 116
Page Number 116
Step 5: If all of the previous steps have been satisfied then examine the
“LINK” light on the Ethernet module. It should be green. If it is not then
first make sure that the Ethernet cable is hooked up at both ends.
Remember that you must use straight through standard CAT5 cables when
going between the blender and a hub or switch. If you are trying to go
directly from the blender to a PC without using a hub or switch I’d then you
need to use a Crossed Ethernet cable. At this point you more than likely
have a cable problem and should test this. To test purchase a standard
CAT5 cable that already has the ends connected and a standard hub or
switch (this can be purchased from Best Buy, Circuit City, CompUSA, or
Radio Shack). At the blender power up the hub and connect the blender
using the new cable to one of the middle ports on the hub (say port 3 on a
4-port hub). Examine the LINK light and if you have it now then the
problem is definitely in your original cabling. This same test can be
performed on the PC and PC cable. All PC Ethernet cards have a LINK
light as well. Establish the LINK light on all devices before proceeding.
Step 6: If you have LINK lights on all units (including the PC) and no fault
lights, but you still cannot establish communications then we need to check
the PC’s network properties. If this computer resides on your plant network
and was set up by your IT department, then you will need to involve them
for further assistance with your problem. Instruct your IT department that
the blenders must have a fixed IP, but the PC can have a dynamic IP. All
subnet mask for the PC and the blenders needs to be 255.255.255.0.
They might not have the startup script correct for your PC. If the blenders
and PC all reside on a separate network that has nothing to do with your
plants LAN then we need to check the PC’s network properties (see
“Chapter1 Networking instructions for the newer AB OS/OA Blender” for
step-by-step).