Troubleshooting
PROGRAMMING MANUAL 304
Revision 3.0
7.4 TJ1-DRT
7.4.1 System errors
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7.4.2 I/O data communication problems
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7.5 TJ1-ML__
7.5.1 System errors
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7.5.2 Bus errors
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Indication Problem Solution
No LEDs are on
or flashing
The power is off. Turn the power on.
The TJ1-DRT is defective. Replace the TJ1-DRT.
ERH LED is on Communication failure between
TJ1-MC__ and TJ1-DRT.
Reset the TJ1-MC__ . If this does
not help, replace the TJ1-MC__.
ERC LED is on Unit error. The TJ1-DRT is defec-
tive.
Replace the TJ1-DRT.
Indication Problem Solution
NOK is flashing
and NF LED is off
The DeviceNet master is not com-
municating with the TJ1-DRT.
• Configure and start the
DeviceNet master.
NOK off and NF
LED is on
The node address duplication
error.
• Check node address.
Network cable error. • Check network cables.
Indication Problem Solution
All LEDs are off The power is off. Turn the power on.
The TJ1-ML__ is defective. Replace the TJ1-ML__.
Indication Problem Solution
BF LED is on Cable failure on the MECHATRO-
LINK-II bus.
Check MECHATROLINK-II cables
between stations connected to the
unit for interruptions and irregular-
ities (short circuit between com-
munication lines A and B, short
circuit of any communication line
with shielding).
MECHATROLINK-II bus termina-
tor is missing or damaged.
Fit a MECHATROLINK-II bus ter-
minator on the last station in the
chain or replace it.
The MECHATROLINK-II station
connected to the unit is lost due to
power off or MECHATROLINK-II
interface failure at the station.
Check the power and MECHA-
TROLINK-II interface of the sta-
tion that caused the problem.
Replace the station if necessary.
The TJ1-ML__ is defective. Replace the TJ1-ML__.
I52E-EN-03.book Seite 304 Freitag, 29. Juni 2007 11:55 11
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