CHAPTER 4: MAINTENANCE AND TROUBLESHOOTING
SNAP PAC R-Series Controller User’s Guide
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Keep this window open on your screen when you call Product Support.
Communicating with the Controller
If you attempt to connect to the controller using its IP address and you cannot, first check
the following:
•
Make sure the controller has been turned on and the LNK and STAT LEDs for the
connected Ethernet interfaces are lit (see
“Connectors and LEDs” on page 37
.)
•
Make sure the controller is mounted on a SNAP PAC rack.
•
Make sure the controller’s hold-down screw has been tightened so that it is firmly
attached to the rack.
•
Verify that you typed in the correct address for the controller. Check the label on the
side of the controller, where the IP address should be written. There are two labels, one
for each Ethernet port, so make sure to look at the right one.
•
Make sure the controller has been assigned a valid IP address and subnet mask. SNAP
PAC R-series controllers come from the factory with a default IP address of 0.0.0.0,
which is invalid. The default subnet mask is 255.255.255.0. To assign an IP address and
subnet mask, see the
PAC Manager User’s Guide
.
•
Make sure that no red LEDs on the controller are lit. A red LED could indicate a voltage
supply problem. Each controller
should have its own power supply. The controller
needs a minimum of 5.0 VDC, measured at the rack.
