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Other Errors Section 9-4
9-4 Other Errors
Status Likely cause and remedy
The Communications Unit’s
Unit Power LED is flashing.
The Unit power supply capacity is insufficient. Check the entire Slice I/O Terminal’s power
supply requirement and replace the power supply with one that has sufficient capacity.
The Communications Unit
repeatedly checks LEDs. (A
DeviceNet Communication
Unit’s MS/NS LED flash green
and red).
The I/O Unit repeatedly
checks LEDs (TS LED flash-
ing green and red).
The Unit power supply capacity is insufficient. Check the entire Slice I/O Terminal’s power
supply requirement and replace the power supply with one that has sufficient capacity.
The Communications Unit’s
TS indicator flashes green.
The I/O Unit’s indicator in
front of the bad connection
lights green and the indicator
behind the bad connection
goes OFF.
The slide connector on the left side of the affected Unit is not connected properly. Con-
nect this slide connector properly and turn the power ON again.
The Communications Unit’s
TS indicator flashes green
and the I/O Unit’s TS indicator
lights green.
The End Unit is not connected properly. Connect the End Unit properly and turn the
power ON again.
The TS indicator is light green
on all of the Slice I/O Termi-
nals and the Communications
Unit indicators do not indicate
an error. The output indicators
on the Digital Output Units are
ON while the outputs are
being sent from the Master
Unit, but the outputs are actu-
ally OFF.
The Slice I/O Unit is not properly connected to the base block (see below). The I/O power
is cut off. Check the Slice I/O Units and make sure that each one is connected mated
properly to the adjacent Units. (Refer to 3-1-2 Connecting Additional Slice I/O Units.)
Communications
Unit Indicator
I/O Unit Indicator
Bad connection
Not lit (OFF)
LED Indicator
Communications
Unit Indicator
I/O Unit Indicator
Bad connection
End UnitLED Indicators
The I/O power supply
connector on the Output Unit
is not mated correctly.
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