Omron CJ1W-PNT21 Operation Manual page 140

Troubleshooting the Network
Valid Output Data Handling
126
/i
LED Indicators
All IO Devices are in Data Exchange and
providing valid input data.
IO Device Alarm received.
All IO Devices that can process output
data are ready for output data.
At least one IO Device that can process
output data is ready for output data.
The IO Controller signals to the IO Devices that the output data it is sends is
valid or not. The IO Devices use the state of the output data to active their
outputs. If the output data is set to invalid it is up to the settings of the IO
Device what will happen.Normally the IO Device will go to an fail-safe state.
the PROFINET IO connection between the IO Controller and IO Device will
stay intact.
The Toggle User Bit button will be accessible if the setting in the IO Controller
Setup item for the Valid Output Data Handling is set to User Bit Controlled.
Now it is possible to manipulate the Set Output Data Valid in Software
Switches 1 (word N bit 12). Normally this bit would be controlled by the PLC
program.
Description/Correction
The Unit could establish an connection to
all configured IO devices. All these IO
Devices are now in Data Exchange and
are providing valid input data.
If one of the IO Devices sets it input data
to be invalid then there could be
something wrong with that IO Device. For
more information refer to the IO Device
Status item or to the IO Device DTM itself
for further information.
Also when an IO Device is simply turned
off it is signalled here also.
One of the IO Devices signalled it has a
alarm available. Refer to the IO Device
status item or the IO Device DTM to
retrieve further.
The IO Controller has found all configured
IO Devices with output data and
successfully created a connection to them.
Now the output data must be activated by
setting the state of the output data to valid.
Output data is set valid by the IO
Controller depending on the setting Valid
Output Data Handling in the IO Controller
Setup item.
It could be or PLC Mode Dependent or
User Bit Controlled.
The IO Controller has found at least one
configured IO Devices with output data
and successfully created a connection to
it.
If the IO Controller can reach at least one
but not all IO Devices this could mean that
something is wrong with the network
connection to that part of the network.
To see which IO devices can not be
reached refer to the IO Device Status item.
Section 8-3