Download User`s Manual - Fuji Electric

6 TROUBLESHOOTING
Symptom
Possible cause
7. Reaction is slow. Input filter is too large.
(Measurement
value changes
very slowly.)
8. Reading does
(1) Input is short-circuited.
not change
although output
(2) Connection with operation terminal
is turned
is off.
ON/OFF.
(3) Power for the operation terminal is
OFF.
(4) Output signal and input signal of
the operation unit do not coincide.
9. Key operation
Parameter LOC is set to 1, 2, 4, or 5.
cannot be
performed.
Parameter value
cannot be
changed.
10. SV cannot be
(1) Parameter LOC is set to 1 or 4.
changed.
(2) Setting of values outside the
measurement range (parameters
Sh1 to SL1) was attempted.
11. Parameter to be
Setting has been made to skip the
checked or
parameters in question with parameters
changed does
ds00 to ds43.
not appear.
12. Auto tuning
(1) After auto tuning was started, input
cannot be done
was set to UUUU.
properly.
Remedy
Decrease the setting of parameter
P1TF.
When PV2 or AI1 is used, decrease
the setting of P2TF or A1TF.
Remove the short-circuited part.
Connect properly.
Set the power to ON.
Provide a thermoregulator
appropriate for the operation
terminal, or provide operation
terminal appropriate for the signals
from the thermoregulator.
Set LOC to 0 or 3. (If LOC is set to 3,
setting cannot be made by
communication.)
Set LOC to 0, 2, 3, or 5.
Extend the range of Sh1 and SL1.
(Do not extend the range exceeding
the values listed in input range table.)
Change the setting of the parameter
in question in ds00 to ds43.
Expand the range of parameters
PV1d, PV1F, and PV1B when
TPLT =53, 54, and expand the range
of parameters UCD1, UCF1, and
UCB1 when TPLT = 50, 51, and then
do auto tuning again.
Restore the SV value to be controlled
and then do auto tuning again.
Make connections with peripheral
devices properly.
Set parameter rEV1 properly.
(2) After auto tuning was done, SV
was changed.
(3) Peripheral devices or connections
with those devices are faulty.
(4) Forward/reverse operation of
thermoregulator and the system of
control target do not coincide.
(5) Control target runs out of time in a Do tuning manually. (Set P1 or PC1
to 0, and perform ON/OFF control.)
very slow process (about 17 hours
or longer).
13. Overshoot is too －
(1) Do auto tuning at ATP1 = LPV
large in auto
(low PV type AT).
tuning.
(2)
Do tuning manually.
－
14. Decimal point
TPLT has been set to 50 or 51.
Set TPLT to 53 or 54, or change the
cannot be
decimal point of UCd1.
changed.
Digital Controller User's Manual
154
See (page)
90
―
159
―
―
98
98
54
123
27
55
―
49
93
55
―
21 or 27
INP-TN514557-E