5.1.13 When Analog Input Cannot Be Calibrated; (When Adjusting Gains T203 (Pr.903) And T403 (Pr.905)) - Mitsubishi Electric FATEC FR-A800 Manual

5
BREAKDOWN MAINTENANCE

5.1.13 When analog input cannot be calibrated

(When adjusting gains T203 (Pr.903) and T403 (Pr.905))

Analog input cannot be calibrated.
Operation at 60 Hz or higher is not available.
Has calibration
been performed?
Select the PU operation mode.
Read T202 (Pr.903)
<T402 (Pr.905)> (frequency gain)
with the SET key.
Change the gain frequency
with the setting dial.
Pressing the SET key
sets the frequency.
Select T203 (Pr.903)
<T403 (Pr.905)> with the setting dial.
Pressing the SET key displays
the analog value (%) of the
current terminals 2 and 5 <4 and 5>.
Is the analog
value negative?
When calibrating the
analog input with
inputting voltage
Input voltage <current> Change the analog
value (%) with
across terminals 2
and 5 <4 and 5>. the setting dial.
100% at 5 V <20 mA>
Press the SET key.
Does the
display blink?
NO
Does an error
occur at writing?
The same analog value
has been set.
Perform calibration again.
5.1 Troubleshooting
64
YES
NO
Read value is the analog voltage value (%).
Bias T201 (Pr.902) <T401 (Pr.904)> is 0%
at 0 V (0 mA), and gain T203 (Pr.903)
<T403 (Pr.905)> is approximately 100%
at 5 V (20 mA) input.
YES
Is the
voltage <current>
input polarity correct?
NO
YES
When calibrating
the analog input
without inputting voltage
When calibration is not performed
Turn the setting dial slightly
to display the current set
analog value (%).
YES
NO
Calibration completed
YES
maximum frequency
related Pr. setting
calibration items
The inverter is faulty.
Replace it with a substitute
or return it to the factory to repair.
NO
Check the polarity value of T201 (Pr.902)
across terminals 2
<T401 (Pr.904)>
and 5 <4 and 5>. approximately 0%?
value of T203 (Pr.903)
<T403 (Pr.905)>
approximately 100%?
difference between the analog
values (%) of the gain
and bias small?
YES
gain lower than
Check the writing condition of
Check the gain and
the operating mode, start signal,
bias values.
write protection, or others.
Is the
NO
correct?
YES Review H400 (Pr.1) Maximum
frequency and H402 (Pr.18)
High speed maximum frequency.
Is the
NO
correct?
YES
Review T000 (Pr.73)
(0 to 5 V, 0 to 10 V selection).
Are the
NO
correct?
YES
Review T200, T201 (Pr.902)
(0 to 5 V, 10 V bias), T202, T203 (Pr.903)
(0 to 5 V, 10 V gain), T400, T401 (Pr.904)
(4 to 20 mA bias), T402, and T403 (Pr.905)
(4 to 20 mA gain).
Are all
NO
parameters
cleared?
Perform all parameter clear.
YES
Is the read
NO
YES
Is the read
YES
Check the input voltage across
NO
terminals 2 and 5
<input current across 4 and 5>.
Is the
YES
Less than 5%
NO
5% or more
Set the difference between the gain
and bias to 5% or more.
Is the
T201 (Pr.902) and T203 (Pr.903)
<T401 (Pr.904) and T403 (Pr.905)>
the bias?
NO