Fuji Electric Micro-Controller X Socket type User Manual

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Troubleshooting
When a trouble occurs, rst check the model, wiring, and parameter settings. The following table shows some
typical cases and their solutions.
Symptoms Causes Remedies
Reference
pages
Parameters you want
to view do not appear
Display mask is set. Check the DSP settings. Page 68
Control output is not
output even with the
power turned on
The ramp soak settings have the
output turned OFF.
Check the ramp soak settings. Page 22
Page 55
Standby mode is on. Check the output settings during
standby mode.
Page 21
Keys do not work
Other than “0” is set in the parameter
of [LoC].
Check the key lock settings. Page 29
SV limit value is set. Check the SV limit value settings. Page 58
The (USER) key settings have
changed.
Check the (USER) key settings.
Page 70
The display has shown
“UUUU” or “LLLL”
The setting of [P-N2] is not correct for
the input signals of sensors or others.
Set the parameter of [P-N2] correctly. Page 42
The polarity of the sensor does not
match that of this controller.
Correct the polarity of the sensor and
this controller.
―
Input terminals are short-circuited in
thermocouple B or R.
([P-N2]=“ 4 ”, “ 5 ”)
Set the parameter of [P-N2] to “ 3 ”,
and check if the temperature around
an ordinary temperature is displayed.
(Thermocouples B and R have a large
error around ordinary temperatures.
However, this is not a fault.)
Page 42
The connecting cables for the sensor
are loose.
Tighten the connecting cables. ―
A break or short-circuit occurred in
the sensor.
Replace the sensor with a new one.
Or remove the short-circuit.
―
The sensor or other input devices that
are connected to this controller have
problems.
Replace the sensor with a new one.
Or remove the short-circuit.
―
The set value of the parameter of [P-SL]
is larger than the value of [P-SU].
Set the parameters again so that the
value of [P-SL] is smaller than the
value of [P-SU] .
Page 43
The process variable is too large or
too small.
Set the parameters again so that the
difference of the set values of [P-SL]
and [P-SU] is made larger.
Page 43

Fuji Electric Micro-Controller X Socket type Specifications

General

Brand	Fuji Electric
Model	Micro-Controller X Socket type
Category	Temperature Controller
Language	English