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Intelligent Technologies (IT.) D77A I/O Module Products
MN05002001E
For more information visit: www.EatonElectrical.com 47
Table 31: Status LED
Communication Hints
Table 32: Communication Hints
Status LED Description Explanation
Mostly Off Offline Everything is OK with in the I/O Module and the I/O Module is not being scanned.
Check that the Network Adapter is commanded to scan QCPort. This is generally done by setting bit 0 of byte
0, for channel A, in the output assembly.
Mostly On Online Everything is OK with in the I/O Module and the I/O Module is being scanned.
50% Faulted Internal memory fault (cycle power).
Verify that there are not any duplicate Group ID’s (address). Check that the address is unique for the QCPort
system.
The Group ID was changed and a reset is required.
Buss fault. All the devices on the QCPort will have the same status LED behavior. A buss fault is caused by an
open or QCPort shorted buss.
Rapid Flash Unacquired The I/O Module has not been discovered/acquired by the Network Adapter, verify that the node ID is set
correctly for the system.
The Network Adapter has not auto configured the QCPort system. In this case all the I/O Module’s will have
the same behavior of the status LED. Perform an auto configuration.
CH Studio is identifying that device. When the device is highlighted in CH Studio this is a way to identify in
the field which device is being highlighted. Remove the highlight from CH Studio and verify that the Rapid
Flash disappears.
Solid On It is possible the I/O Module is in firmware download mode, cycle power to exit that mode. If the LED stays
solid On after the power cycle, it is possible that the I/O Module has in internal failure and will need to be
replaced.
Off No Power The I/O Module is not powered or a memory fault in NV RAM has occurred that will require the I/O Module to
be replaced.
Problem Solution
Are all the QCPort devices
connected to one Network
Gateway are not
communicating? Are all the
Status LED’s either Rapid
Flash or 50% On
Check the Network Adapter, is the ST LED Green? – If the LED is green, then perform an auto configuration of
the Network Adapter and see if the problem goes away.
There may be a damaged I/O Module or a shorted QCPort communication wire that is prohibiting QCPort
communications. Remove all the I/O Modules from the QCPort system.
Unplug the Network Adapter from the industrial network.
Cycle power to the Network Adapter.
One by one plug the I/O Modules back in and verify that the status LED is mostly off as they are plugged back in.
When the I/O Module the causes the system to fail is plugged in, the I/O Module’s status LED will rapid flash or
50% flash only.
Remove the I/O Module and check the QCPort connections for shorted or damaged wires or connections.
When all the I/O Modules are online, plug the Network Adapter into the industrial Network.
It is possible that the terminating resistors are damaged, replace the terminating resistors.
Is there a single I/O Module
in the system that is not
communicating?
The problem may be that the I/O Module has a fixable internal communication failure. Perform a reset by
toggling the rotary switch from 0 to 1 five times, reset the rotary switch to the correct group ID (address).
It is also possible the Group ID rotary switch was changed after auto configuration. Check the rotary switch and
verify that they are in the correct position for that address. Physically move the rotary switch from one position
to another to verify that it is in the correct position (there will be a “snap” when it reaches the next state).
Unplug and replug the device and check that the problem disappears.
It is possible that the communication connections are damaged or unplugged.
It is possible that the terminating resistors are damaged, replace the terminating resistors.
During auto configuration
the Network Adapter will not
detect any of the I/O
Modules.
Check the status LEDs on the I/O Module units, if the LEDs are rapid flashing or 50% On refer to the above
problem for a solution.
If the status LEDs on the I/O Module units are all slow flashing, the Network Adapter has already connected to
the I/O Module units and the problem is that the CH Studio software is not displaying the I/O Module units. This
can be because the scanner is not allowing CH Studio to send long messages.
The Network Adapter cannot perform an auto configuration if the system controller is scanning the Network
Adapter. Disconnect the Network Adapter from the industrial network and reattempt the auto configuration.