Fuji Electric Micro-Controller X Socket type Operation Manual page 76

Troubleshooting
Symptoms
"Err" has been
displayed.
A decimal point has
not been displayed.
The SV or the set
values of some
parameters have been
changed without any
operation.
ON/OFF (2-position)
control has not
function properly.
ON/OFF (2-position)
control has not
function properly.
The Micro-controller
is not controlling
properly.
Causes
The value of [P-SU] is set to 3277°C
or more for thermocouple and
resistance bulb input.
The measured range ([P-SU] to [P-SL])
is set to 10000 or more for voltage and
current input.
"0" is set in the parameter of [P-dP].
The parameter of [P-SL], [P-SU],
or [P-dP] was changed.
When the set value of [P-SU] is larger
than 1000, "1" is registered for [P-dP].
Other than "oNoF" is set in the
parameter of [CtRL].
The setpoint of the parameter [P] is
"0.1" or greater.
The set value of parameter [HyS] is
not correct.
The setting of parameter [oNoF] is
not correct.
The set values of the parameters [P],
[i], and [d] are not correct.
The cycle times are too long.
Output is limited.
Output is not limited correctly.
Set the parameters of [P-SL] and [P-SU]
again according to the input range table.
Set the parameters of [P-SL] and [P-SU]
again so that the measured range is 9999
or less.
Set the parameter of [P-dP] to "1" to
"3".
Set all the parameters again.
( If you change [P-SL], [P-SU], or
[P-dP], the setpoints of the parameters
of which measurement range is the
industrial value (those shaded in
the Parameter List) automatically
change.)
Set [P-dP] to "0", and return [P-SU]
to an original value.
Set the parameter [CtRL] to "oNoF." Page 36
Set the parameter [P] to "0.0."
Adjust the set value of parameter
[HyS] to be suitable for the device to
be controlled.
Set the parameter [oNoF] correctly.
Perform the auto-tuning.
Decrease the set value of the
parameter [tC] gradually.
Set the parameters of [PLC1] and
[PHC1] again to be suitable for the
process.
Set the parameters of [PCUt] again to
be suitable for the process.
74
Remedies
Reference
pages
Page 43
Page 43
Page 45
Page 15
to 18
Page 45
Page 43
Page 30
Page 32
Page 40
Page 25
Page 41
Page 62
Page 63