-37-
No.EX※※-OMS0027
No.
Part No.
EX600-
Problem Presumed cause Troubleshooting
Red LED is ON.
(Diagnosis is
activated)
Analogue input or output
device power supply is
short-circuited.
Check the parts with error by using the LED display or
unit diagnostic data
or master. Re-wire the
short-circuited part, and check if the cable and analogue
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 Analogue
input unit is set to current input.
(1)Set the input value of the analogue input device so
that it does not exceed the upper limit.
(2)Voltage is input from the analogue input device.
Ensure the range of the input unit matches the range
of the input device.
Red LED is
flashing.
(Diagnosis is
activated)
(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 analogue 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 analogue 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.
An internal memory error
occurred in the Analogue
input/ output unit.
Turn OFF the power for the unit and then turn it ON
again. If the error is not eliminated, stop the operation
and contact SMC.
8
Red ST(M) LED is
flashing.
(Diagnosis is activated)
(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
unit diagnostic data
or master.
(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.
Turn OFF the power for the unit and then turn it ON
again. If the error is not eliminated, stop the operation
and contact SMC.
9
Red/Green ST(M) LED is
flashing alternately.
Connection error between
units is detected.
Confirm that there is no loose connection between the
units and connect them correctly.
Red PWR LED is ON.
(Diagnosis is activated)
Power supply voltage for
control and input is out of
range.
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 out of range.
Supply 24 VDC +10/-5% for output power source.
: The unit diagnostic data can be checked using EtherNet/IP object, Web server or Handheld Terminal.
Refer to "Diagnostic" (page 62) fo
r details.
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