Rockwell-automation 1788 NetLinx Media Checker Users Manual Manual de usuario descargar pdf (Pagina 16)

The Test Function (TEST)

1788-UM002A-US-P – April 2000

Table 8. DeviceNet Test Results (with Cable ID)

Display Failure Description

Short across the data pair

“SHORT” is blinking. L and H are shorted together at

approximately 600' (183 m).

Split pair

“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, or a wire is swapped with

the shield

“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. 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.

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Rockwell-automation 1788 NetLinx Media Checker Users Manual Manual de usuario Pagina 16