Troubleshooting
PROGRAMMING MANUAL 346
Revision 1.0
6.6 TJ1-ML__
6.6.1 System errors
/i
6.6.2 Bus errors
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6.7 GRT1-ML2
Some analog I/O Units initialize slower after power on than others. If such an
I/O Unit reports its correct status too late to the GRT1-ML2, the status word
of the GRT1-ML2 has bit 13 set, which means that there is an error or a
warning in the SmartSlice system. The default value of the error mask is set
to detect if this bit is on, and thus an error is detected and reported by the
BF flashing Invalid configuration. Check downloaded configuration.
If necessary re-download it.
BF flashing
single flash
Error counter warning limit
reached. Possible causes:
• No other nodes on the net-
work.
• Network termination incor-
rect.
• Network cables installed
incorrect.
Check the network cabling and
network nodes.
BF flashing
double flash
A heartbeat event occurred.
An expected heartbeat message
from another node was not
received within the timeout inter-
val.
Check the node, which was
expected to send the heartbeat
message.
BF is ON The unit is in Bus OFF state
Possible cause: Network cable
short-circuit.
Check the network cabling.
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
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__.
Note
After removing the cause of an error, make sure to re-initialise the
MECHATROLINK-II bus on the unit on which the error appeared.
Type in the Trajexia Tools terminal window:
MECHATROLINK(n, 0)
where n is the number of the unit to which the unit that caused the
error is connected.
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