Rockwell Automation 1788 NetLinx Media Checker Users Manual - Manual (Page 13)

The Test Function (TEST) 13
1788-UM002A-US-P – April 2000
The Test Function (TEST)
The TEST function tests the attached cable and indicates
“PASS” or “FAIL” based on the cable’s compliance with
the parameters stored in the MediaChecker for the
selected cable. The tests that are performed (Table 7)
depend on whether or not a Cable ID is connected to the
far end of the cable.
To test only the wire map or measure only the cable
length, use the WIRE MAP or LENGTH functions. See
“Testing the Wire Map” on page 24 or “Measuring Cable
Length” on page 27.
To test a cable, do the following:
1. Disconnect all network devices (nodes) and remove
the terminator from the far end of the cable to be
tested. (For information on calculating the length of a
terminated cable, see “Calculating the Distance to a
Short” on page 32.)
2. For DeviceNet, DH+/RIO, and Ethernet cables,
connect the Cable ID to the far end of the cable, if
desired (refer to Table 7).
3. Connect the cable under test to the appropriate
connector on the MediaChecker. Use the included
adapter for DeviceNet or DH+/RIO cables.
4. Turn the rotary switch to TEST.
You can omit step 5 if you know the cable selection
is correct for the cable under test:
5. Press E to check the cable selection. The
MediaChecker displays the cable selection for a few
seconds, then starts the test. If the cable selection is
not correct, refer to “Preparing the MediaChecker for
Use” on page 8.
“CAL” appears in the second line of the display if a
cable calibration has been performed for the selected
cable type. See “Calibrating the MediaChecker to a
Cable” on page 10 for more information.