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8. Troubleshooting
8-3
TNU
2.
Causes and counter measures of alarms
2-1
Causes and counter measures of alarms
No. Alarm name
Generation
status
Causes
Counter measures
1 Net device list
collapse
While energizing Data in TNU flash rom were
corrupted
Replace TNU with new one
2
Device error While energizing TNU is out of order
Replace TNU with new one
3
Rotary SW
setup error
While energizing After the start-up, the rotary
SW value was changed
Restore the rotary SW value
to a normal state and turn on
the power again
4
Upper-level
communication
error
*
In
communication
Inconsistency between
master and TNU external
network parameter settings.
Match parameter settings.
Cables between TNU and
master are disconnected or
misconnected.
Replace the cables or
connect them correctly.
5
TACnet
communication
error
(Lower-level
communication
error)
*
In
communication
The CRC error was detected
in the returned data
Eliminate the noise source
from the set environment
Communication data was
corrupted due to noise
Eliminate the noise source
from the set environment
Cable is not properly
connected
Connect the cable in proper
way
Cable is disconnected
Replace the cable with new
one
Connector is not properly
connected
Connect it in proper way
The driver controller is broken Replace the driver controller
with new one
The driver controller is not
power-up
Check if the power of the
driver controller is turned on
There is some driver
controller of the duplicate ID
over the network
Change to a non-duplicate
ID and turn on the power of
the driver controller and TNU
again.
No driver controller is
connected to the ID set for
the net device list.
Set the net device list in
proper way.
Or connect the driver
controller.
The communication speed
with the driver controller is
not aligned
Set the communication
speed in proper way
TJU's termination resistance
setting is wrong
Set the termination resistance
in proper way
* On the D-STEP screen, CC-Link, EtherCAT, EtherNet/IP or DeviceNet communication error and
TACnet communication error are indicated as, respectively, upper-level communication error and
lower-level communication error.
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тел. +7(499) 703-39-86