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.
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.
Red LED is ON
(C/Q or P24)
(When
diagnostics is
valid)
Short circuit of L + power
supply or C/Q terminal or
P24.
Check the parts showing an error using the LED display
or via the Web server. Re-wire the short-circuited part or
check if the cable, IO-Link master device or IO-Link
device are normal.
Red and green
LEDs are ON
alternately.
An internal memory error
has occurred in the
IO-Link master unit.
Turn off the power to the unit and then turn it on again. If
the error is not eliminated, stop using the product and
contact your SMC sales representative.