I/O Data Communication Problems - Omron TJ1-MC04 - PROGRAMMING 1 Programming Manual

Troubleshooting
7.3.2

I/O data communication problems

/i
Indication Problem
COMM LED is off The PROFIBUS configuration is
and BF LED is on incorrect, there is no communica-
tion with the master.
The PROFIBUS wiring is not cor-
rect.
You have not properly terminated
the PROFIBUS network.
The PROFIBUS master unit is
defective.
The TJ1-PRT is defective.
PROGRAMMING MANUAL
Solution
• Check that the TJ1-PRT has
the same station address as
in the configuration of the
master.
• Check that no station
address is used twice.
• Check that the correct pins
of the CN1 connector are
connected.
• Check that there are no
short circuits or line interrup-
tion.
• Check that you use the cor-
rect cable type.
• Check that the stub lines are
not too long.
Terminate the PROFIBUS net-
work at the appropriate places.
Replace the master unit.
Replace the TJ1-PRT.
Indication Problem
COMM LED is off The PROFIBUS configuration is
and BF LED is incorrect, there is no communica-
flashing tion with the master.
You have not selected configura-
tion data for the slave.
The TJ1-PRT is defective.
Solution
• Check that you use the cor-
rect GSD file in the master.
• Check the configuration and
the parameter data of the
slave.
• Check that the network has
been configured to commu-
nicate at the baud rate sup-
ported by the TJ1-PRT.
Check the configuration at the
master.
Replace the TJ1-PRT.
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