SMC Networks EX600-ED Series, Operation Manual

Page: 40 / 82

-39-
No.EX##-OMN0030-A
No.
Part No.
EX600-
Problem Presumed cause Troubleshooting
Red LED is ON.
(Diagnosis is
activated)
Diagnosis error
Analog input or output
device power supply is
short-circuited.
Check the parts with error by using the LED display or
PLC
∗
or H.T. Re-wire the short-circuited part, and check
if the cable and analog input or output device are
normal.
“0 and 1” red
LEDs are ON.
Input value has exceeded
the upper limit when set to
Current input type range.
Check the following when the range of the analog input
unit is set to current input.
(1)Set the input value of the analog input device so that
it does not exceed the upper limit.
(2)Voltage is input from the analog input device. Ensure
the range of the input unit matches the range of the
input device.
Red LED is
flashing.
(Diagnosis is
activated)
Diagnosis error
(1)Input value has
exceeded the upper or
lower limit of the range.
(2)Input or output value
(value set by user) has
exceeded the upper or
lower limit.
(1)If the input value from the analog input device
exceeds the upper or lower limit of the range, select
the appropriate range so that the input value is within
the range. Or invalidate diagnosis.
(2)If the input (output) value from the analog input
(output) device exceeds the upper or lower limit of the
user set value, adjust it so that the input (output)
value is within the range of the user set value. Or
invalidate diagnosis.
7 AMB
Red/green all
LEDs are
flashing.
Unit has failed. Stop the operation and contact SMC.
8
Red ST(M) LED is
flashing.
(Diagnosis is activated)
Diagnosis error (SI unit)
(1)Valve is short-circuited.
(2)Valve is open-circuited.
(3)ON/OFF count of the
valve has exceeded
the set value.
Check the parts with error by using the LED display or
PLC
∗
or H.T.
(1)Check the operation after replacing the valve.
(2)Check the operation after replacing the valve.
(3)Reset the ON/OFF count to zero or change the set
value. Or invalidate diagnosis.
Red ST(M) LED is ON. SI unit has failed. Stop the operation and contact SMC.
9
Red/green ST(M) LED is
flashing alternately.
(1)Connection between
the units is defective.
(2)Configuration memory
error.
(1)Confirm that there is no loose connection between
the units and connect them correctly.
(2)Unit layout is not the same as the unit layout when it
was memorized. Return the layout to the same as
when it was memorized, or update the configuration
memory, or turn off the configuration memory
function.
Red PWR LED is ON.
(Diagnosis is activated)
Power supply voltage for
control and input is
abnormal.
Supply 24 VDC ±10% for control and input power
source.
10
Red PWR(V) LED is ON.
(Diagnosis is activated) Power supply voltage for
output is abnormal.
Supply 24 VDC +10/-5% for output power source.
∗
: Refer to “Diagnosis” (page 62) for the further details.