SMC Networks EX510-GPR1 Series Operation Manual page 60

Trouble No.6
Trouble Possible cause
BF LED PROFIBUS
lights up communication error.
Trouble No.7
Trouble Possible cause
Incorrect branch
cable connection
A port COM
LED to show
the
Branch cable failure
connection
with low side
goes off
( ∗ : COM LED of
the port set as
unused remains
Unconnected Input
off)
unit
Broken Input unit fuse
Trouble No.8
Trouble Possible cause
Incorrect output
power supply
PWR(V) LED
connection
goes off
Output power supply
failure
Investigation method of cause
Confirm the signal line from PLC is
connected correctly.
Address setting error:
[In hardware mode]
Confirm the address setting of DIP
switch is performed correctly.
[In software mode]
Confirm the address set through
network is correct.
Confirm the number of I/O points are set
correctly.
Check the length of communication line
in respect to the communication speed,
presence of the terminating resistor at
both ends of transmission line and use
of PROFIBUS dedicated cable.
Confirm UNIT STATUS at GW unit side
consists the one at master side.
Confirm there is no equipment and high
voltage line which might generate a
noise around the communication line.
Investigation method of cause
Confirm there is no breakage, incorrect
connection and looseness at connecting
part of the branch cable.
Confirm there is no equipment and high
voltage line which might generate a
noise around the branch cable.
Check the length of the branch cable
and use of dedicated cable.
Confirm the Input unit is connected after
the Input port.
Confirm the fuse is not broken.
Investigation method of cause
Confirm there is no incorrect connection
between output power supply and GW
unit power supply connector.
Confirm the condition of output power
supply.
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Solution
Fix the connection.
Fix the setting of the GW unit.
Fix the setting.
Fix the connection and setting.
Fix the setting.
Take a proper measure such as
by separating the
communication line from the
noise source.
Solution
Fix the connection of the branch
cable.
Take a proper measure such as
by separating the branch cable
from the noise source.
Fix the connection.
It is not breakage. However, if
an Input unit is used, incorrect
connection is also possible
cause. In that case, fix the
connection.
Replace with a new one.
Solution
Fix the connection.
Supply 24 V DC +10%/-5% for
output power supply.
No.EX##-OMI0032-C