8. Troubleshooting
1.
Alarm lists
8-2
TNU
1-1
Alarm lists
Alarm functions of TNU are as follows:
The method to check the alarm is described in
3-4 Alarm history display screen (-> P.6-10)
.
No.
Alarm name
Content
STAT LED
1
Net device list collapse
A value out of the setting range
is contained in the net device list
upon start-up.
2
Device error
TNU is out of order.
3
Rotary SW setup error
After the start-up, the rotary SW
was changed.
4
Upper-level communication error*
Timeout or communication error
was detected in the upper-level
communication.
5
TACnet communication error
(Lower-level communication error)
*
T i m e o u t o r c o m m u n i c a t i o n
error were detected in TACnet
communication.
: Red flashing
1.
Alarm lists
* 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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