Allen-Bradley MediaChecker 1788-MCHKR Manual page 16

16
The Test Function (TEST)
Display
1. The MediaChecker might not be able to map some situations with four or five wires miswired. In all cases, the MediaChecker indicates
a fault and gives a partial description of the problem, but might not identify all of the wiring errors.
2. The distance to a short may not be reported, depending on the characteristics of the short. See "Calculating the Distance to a Short" on
page 32 for more information.
1788-UM002A-US-P – April 2000
Table 8. DeviceNet Test Results (with Cable ID)
Failure
Short across the data pair
Split pair
Open, or a wire is swapped with
the shield
2
"SHORT" is blinking. L and H are shorted together at
approximately 600' (183 m).
"SPLIT PR" is blinking. In this case, a power wire and a
data wire are swapped at the near end and swapped
back at the far end.
"OPEN" is blinking. This can mean one of the following:
• The + wire is open somewhere along the cable.
• The + and S wires are swapped somewhere along
the cable.
1
Description