Rockwell Automation 1752-L24BBBE SmartGuard 600 Controllers Installation - Manual (Page 21)

SmartGuard 600 Controllers 21
Publication 1752-IN001C-EN-P - January 2009
If your I/O Status indicator is on or flashing red, follow these steps.
1. Check that the signal wire:
•
is not making contact with the power source (positive side).
•
does not have an earth fault.
•
is not disconnected.
2. Make sure there is not a short-circuit between signal wires.
3. Check that there is no overcurrent for the output.
4. Make sure there is no failure in the connected devices.
5. Verify that the Discrepancy Time settings are valid.
If your I/O Status indicator is off, follow these steps.
1. Check that the power supply voltage is set within the specified range.
2. Make sure a cable or wire is not disconnected.
USB Communication (COMM U) Status Indicator Descriptions
If the USB
Communication
(COMM U) status
indicator is It means Take this action
Yellow, flashing The controller is communicating. No action required.
Off The controller is not communicating.
I/O (inputs 0...15, outputs 0...7) Status Indicators Descriptions
If the I/O status
indicators are It means Take this action
Red, on A failure has been detected in the
input or output circuit or a discrepancy
error has occurred in the I/O set for
Dual-channel mode. Refer to the corrective action following this
table.
Red, flashing A failure has been detected in the
associated I/O circuit’s dual channel
configuration.
Off The input or output signal is off.
Yellow, on The input or output signal is on. No action required.